Hollis J. C. Underwood, M.D.
Internal Medicine · Phoenix, AZ
At a glance
4420 E Mcdowell Rd, Phoenix, AZ 85008-4504
Published activity: Skin biopsy. View counts and coverage
NPPES record updated Sep 10, 2024. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
This clinician has a currently effective opt-out record in the imported CMS file. Ask the practice about payment arrangements before booking.
- Effective Oct 1, 2026 through Oct 1, 2028
Source: Opt Out Affidavits : 2026-08-01 · Reporting period: 2026-08-01 to 2026-08-31 · Published Sep 21, 2026.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
4420 E Mcdowell RdPhoenix, AZ 85008-4504
Education & affiliations
- Medical / professional school
- Howard University College Of Medicine
- Graduation year
- 1983
- CMS specialties
- Internal Medicine
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
| Procedure category | Published Medicare activity |
|---|---|
| Skin biopsy | 1-10 |
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
Industry-reported general payments
No matching general-payment summary in the imported release. This is not a verified zero and does not rule out other payment types or years.
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Internal Medicine
- Taxonomy code
- 207R00000X
- Enumeration date
- Jan 2, 2007
- Record updated
- Sep 10, 2024
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- M.D.
Reported taxonomies and licenses
207R00000X · Primary
License reported: 22415 AZ
174400000X
License reported: 22415 AZ
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
4420 E Mcdowell RdPhoenix, AZ 85008-4504
- Phone
- (602) 858-4295
Mailing address
102 WOODMONT BLVD STE 600NASHVILLE, TN 372055250
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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