Peter Fay, MD
NPI 1154384337 · Internal Medicine Physician · Sunnyvale, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Peter Fay, MD is a Internal Medicine Physician provider in Sunnyvale, CA (NPI 1154384337).
Provider details
- NPI number
- 1154384337
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A70138 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
38 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Blood Glucose (sugar) Test Performed By Hand-Held Instrument82962 | 38 | $3 |
Typical Medicare-allowed amounts for these services range $3–$3 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 55 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 350 | 115 |
| Amlodipine Besylate | 189 | 68 |
| Metformin Hcl | 139 | 51 |
| Losartan Potassium | 129 | 40 |
| Tamsulosin Hcl | 120 | 36 |
| Levothyroxine Sodium | 87 | 28 |
| Gabapentin |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-10
- Last updated
- 2017-01-04
Frequently asked questions
- What is Peter Fay's NPI number?
- Peter Fay's National Provider Identifier (NPI) is 1154384337, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peter Fay's specialty?
- Peter Fay is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Peter Fay located?
- Peter Fay's practice location on file with NPPES is 660 S Fair Oaks Ave, Sunnyvale, CA 94086-7913.
- What is Peter Fay's phone number?
- The practice phone number listed in the NPPES registry for Peter Fay is (408) 992-4858.
- Does Peter Fay accept Medicare?
- Peter Fay is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Peter Fay's NPI active?
- Yes — Peter Fay's NPI (1154384337) is active in the NPPES registry as of the last update on 2017-01-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.