Betsy Felser, MD
NPI 1144292897 · Internal Medicine Physician · Pasadena, CA
Betsy Felser, MD is a Internal Medicine Physician provider in Pasadena, CA (NPI 1144292897).
Provider details
- NPI number
- 1144292897
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- G84832 (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
20 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 · 50 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 259 | 72 |
| Amlodipine Besylate | 178 | 45 |
| Levothyroxine Sodiumbrand: Synthroid | 135 | 29 |
| Metformin Hcl | 110 | 31 |
| Escitalopram Oxalate | 99 | 22 |
| Levothyroxine Sodium | 84 | 21 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$52 across 3 records (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
- 2006-02-06
- Last updated
- 2007-07-08
Frequently asked questions
- What is Betsy Felser's NPI number?
- Betsy Felser's National Provider Identifier (NPI) is 1144292897, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Betsy Felser's specialty?
- Betsy Felser is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Betsy Felser located?
- Betsy Felser's practice location on file with NPPES is 10 Congress St, Pasadena, CA 91105-3023.
- What is Betsy Felser's phone number?
- The practice phone number listed in the NPPES registry for Betsy Felser is (626) 844-9111.
- Is Betsy Felser's NPI active?
- Yes — Betsy Felser's NPI (1144292897) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.