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Compare the published Medicare service mix of John Steven Irons, M.D. with clinicians in the same registry specialty: Allergy/Immunology (CMS).

BETHESDA, MD · 10 milesEdit location
Within 10 miles · Approximate ZIP-area distance

Approximate straight-line distances between ZIP-area centers; a city search starts from the average of its ZIP centers. Uses the primary reported practice ZIP, not an exact office address or driving distance. Records without matched coordinates are excluded. How distance works

2024 published service data · 21 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Paul Michael Goldberg, D.O.

Allergy/Immunology (CMS) · Rockville, MD

Shared published services
3 shared services · view billing descriptions
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Test to measure expiratory airflow and volume (94010)
76%Service-mix similarity~2.5 milesView profile →

Nasim Nichole Reedy, D.O.

Allergy/Immunology (CMS) · Gaithersburg, MD

Shared published services
3 shared services · view billing descriptions
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Professional service for multiple injections of allergen (95117)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
76%Service-mix similarity~7.4 milesView profile →

D'jahna Thomas, MD

Internal Medicine (CMS) · Silver Spring, MD

Shared published services
3 shared services · view billing descriptions
  • Professional service for multiple injections of allergen (95117)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Test to measure expiratory airflow and volume (94010)
73%Service-mix similarity~8.2 milesView profile →

Shelby Josephs, MD

Specialty details in registry · North Bethesda, MD

Shared published services
2 shared services · view billing descriptions
  • Professional service for multiple injections of allergen (95117)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
70%Service-mix similarity~1.5 milesView profile →

Rachel Lise Schreiber, M.D.

Allergy/Immunology (CMS) · Rockville, MD

Shared published services
3 shared services · view billing descriptions
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Professional service for multiple injections of allergen (95117)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
67%Service-mix similarity~3.3 milesView profile →

Courtney Jackson Blair, M.D.

Allergy/Immunology · Internal Medicine (CMS) · Mc Lean, VA

Shared published services
3 shared services · view billing descriptions
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Professional service for multiple injections of allergen (95117)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
65%Service-mix similarity~7.7 milesView profile →

Paul Bernhard Keiser, M.D.

Allergy/Immunology · Infectious Disease · Internal Medicine (CMS) · Rockville, MD

Shared published services
3 shared services · view billing descriptions
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Professional service for multiple injections of allergen (95117)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
65%Service-mix similarity~1.5 milesView profile →

Appaji Gondi, M.D.

Allergy/Immunology (CMS) · Mc Lean, VA

Shared published services
3 shared services · view billing descriptions
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Professional service for multiple injections of allergen (95117)
  • Test to measure expiratory airflow and volume (94010)
65%Service-mix similarity~7.6 milesView profile →

Vasif Cuneyt Kalfa, MD

Allergy/Immunology · Pediatric Medicine (CMS) · Silver Spring, MD

Shared published services
3 shared services · view billing descriptions
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Professional service for multiple injections of allergen (95117)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
63%Service-mix similarity~6.8 milesView profile →

Julia Kim Sohn, MD

Allergy/Immunology (CMS) · Rockville, MD

Shared published services
3 shared services · view billing descriptions
  • Professional service for multiple injections of allergen (95117)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
46%Service-mix similarity~3.3 milesView profile →

Carla Marie Mosby, MD

Allergy/Immunology (CMS) · Chevy Chase, MD

Shared published services
3 shared services · view billing descriptions
  • Professional service for preparation and provision of 1 or more antigens (95165)
  • Professional service for multiple injections of allergen (95117)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
45%Service-mix similarity~5.6 milesView profile →

Nneoma Obiejemba, M.D

Allergy/Immunology (CMS) · Rockville, MD

Shared published services
3 shared services · view billing descriptions
  • Professional service for multiple injections of allergen (95117)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
43%Service-mix similarity~1.5 milesView profile →
How this comparison works

We use the same calendar year of CMS Medicare Physician & Other Practitioners data for both providers. Published non-drug service counts are combined by HCPCS code across places of service. We apply log(1 + count), normalize the vectors, and compare them using cosine similarity.

Candidates share the reference provider’s current NPPES primary taxonomy and match the location you enter. We examine up to 500 candidates in approximate distance order, then show up to 12 with the highest positive similarity within that set. The score is not a percentile, medical recommendation, or prediction. Suppressed services are not estimated. Medicare fee-for-service data does not describe a provider’s entire practice.

Source: CMS Medicare Physician & Other Practitioners - by Provider and Service : 2024-12-01 · Published May 21, 2026.