Jennifer Mah, MD
NPI 1811316979 · Internal Medicine Physician · Baldwin Park, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jennifer Mah, MD is a Internal Medicine Physician provider in Baldwin Park, CA (NPI 1811316979).
Provider details
- NPI number
- 1811316979
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A139905 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
12 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 62 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 293 | 142 |
| Amlodipine Besylate | 216 | 104 |
| Losartan Potassium | 183 | 94 |
| Rosuvastatin Calcium | 158 | 74 |
| Lisinopril | 155 | 86 |
| Levothyroxine Sodium | 138 | 56 |
| Metformin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$124 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2014-04-15
- Last updated
- 2021-11-30
- Certified
- 2020-05-13
Frequently asked questions
- What is Jennifer Mah's NPI number?
- Jennifer Mah's National Provider Identifier (NPI) is 1811316979, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jennifer Mah's specialty?
- Jennifer Mah is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jennifer Mah located?
- Jennifer Mah's practice location on file with NPPES is 1011 Baldwin Park Blvd, Baldwin Park, CA 91706-5806.
- What is Jennifer Mah's phone number?
- The practice phone number listed in the NPPES registry for Jennifer Mah is (833) 574-2273.
- Does Jennifer Mah accept Medicare?
- Jennifer Mah is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jennifer Mah's NPI active?
- Yes — Jennifer Mah's NPI (1811316979) is active in the NPPES registry as of the last update on 2021-11-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.