Jacob Aaron, MD
NPI 1407202518 · Internal Medicine Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jacob Aaron, MD is a Internal Medicine Physician provider in San Francisco, CA (NPI 1407202518).
Provider details
- NPI number
- 1407202518
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A168040 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
10 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
277 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 | 77 | $78 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 55 | $173 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 46 | $130 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 38 | $115 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 24 | $118 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 19 |
Practice location
Mailing address
Additional practice locations (1)
- 41 Mall RdBurlington, MA 01805-4403Phone: (781) 744-8000
Registry dates
- Enumerated
- 2016-05-06
- Last updated
- 2023-03-06
- Certified
- 2023-03-06
Frequently asked questions
- What is Jacob Aaron's NPI number?
- Jacob Aaron's National Provider Identifier (NPI) is 1407202518, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jacob Aaron's specialty?
- Jacob Aaron is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jacob Aaron located?
- Jacob Aaron's practice location on file with NPPES is 3555 Cesar Chavez, San Francisco, CA 94110-4403.
- What is Jacob Aaron's phone number?
- The practice phone number listed in the NPPES registry for Jacob Aaron is (415) 600-6000.
- Does Jacob Aaron accept Medicare?
- Jacob Aaron is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jacob Aaron's NPI active?
- Yes — Jacob Aaron's NPI (1407202518) is active in the NPPES registry as of the last update on 2023-03-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.