Frederick Joseph Nachtwey, M.D.
Internal Medicine · Pulmonary Disease · Sleep Medicine (CMS) · Walnut Creek, CA
At a glance
2637 Shadelands Dr, Walnut Creek, CA 94598-2512
NPPES record updated Mar 3, 2025. 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
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
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
2637 Shadelands DrWalnut Creek, CA 94598-2512
Additional reported practice locations
2101 Vale Rd Ste 300San Pablo, CA 948063846
Phone: 5102333788
Fax: 5102333390
Education & affiliations
- Medical / professional school
- Washington University School Of Medicine
- Graduation year
- 1974
- CMS specialties
- Internal Medicine · Pulmonary Disease · Sleep Medicine
Practice groups
Reported hospital affiliations
- Contra Costa Regional Medical Center Martinez, CA
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.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
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
Includes reported transfers of value, such as meals, travel, or consulting. Payments do not establish improper conduct or quality of care. Research funding and ownership values are excluded from this total.
See payment purposes and reporting companies
Reported purposes
| Purpose | Amount |
|---|---|
| Food and beverage | $106.35 |
Reporting companies
| Company | Amount |
|---|---|
| INSPIRE MEDICAL SYSTEMS, INC. | $106.35 |
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 · Pulmonary Disease · Sleep Medicine (CMS)
- Taxonomy code
- 207RP1001X
- Enumeration date
- Jul 26, 2006
- Record updated
- Mar 3, 2025
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- M.D.
Reported taxonomies and licenses
207RS0012X
License reported: G35274 CA
207RP1001X · Primary
License reported: G35274 CA
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
2637 Shadelands DrWalnut Creek, CA 94598-2512
- Phone
- (925) 944-0166
Mailing address
2637 SHADELANDS DRWALNUT CREEK, CA 945982512
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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