Patrick Ahearn, MD
NPI 1972878072 · Nephrology Physician · Stanford, CA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Patrick Ahearn, MD is a Nephrology Physician provider in Stanford, CA (NPI 1972878072).
Provider details
- NPI number
- 1972878072
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A129551 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
14 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
761 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 289 | $89 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 162 | $164 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 69 | $134 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 66 | $211 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 64 | $110 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 114 | 24 |
| Losartan Potassium | 111 | 20 |
| Carvedilol | 105 | 19 |
| Prednisone | 88 | 22 |
| Tacrolimus | 75 | — |
| Atorvastatin Calcium | 67 | 17 |
| Pantoprazole Sodium | 56 | 11 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-03-21
- Last updated
- 2024-04-17
- Certified
- 2024-04-17
Frequently asked questions
- What is Patrick Ahearn's NPI number?
- Patrick Ahearn's National Provider Identifier (NPI) is 1972878072, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Patrick Ahearn's specialty?
- Patrick Ahearn is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Patrick Ahearn located?
- Patrick Ahearn's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Patrick Ahearn's phone number?
- The practice phone number listed in the NPPES registry for Patrick Ahearn is (650) 723-4000.
- Does Patrick Ahearn accept Medicare?
- Patrick Ahearn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Patrick Ahearn's NPI active?
- Yes — Patrick Ahearn's NPI (1972878072) is active in the NPPES registry as of the last update on 2024-04-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.