Catherine Biren, M.D.
NPI 1124021035 · Dermatology Physician · Modesto, CA
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Catherine Biren, M.D. is a Dermatology Physician provider in Modesto, CA (NPI 1124021035).
Provider details
- NPI number
- 1124021035
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- GR0045780 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
21 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,031 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 497 | $8 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 136 | $101 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 132 | $60 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 82 | $143 |
| Destruction of Skin Growth, 1-14 Growths17110 | 71 | $129 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ketoconazole | 129 | 70 |
| Triamcinolone Acetonide | 35 | 25 |
| Doxycycline Hyclate | 17 | — |
| Clobetasol Propionate | 16 | 13 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$584 across 8 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
Additional practice locations (1)
- 9781 Blue Larkspur Ln Ste 100Monterey, CA 93940-6509Phone: (831) 333-9008Fax: (831) 333-9010
Registry dates
- Enumerated
- 2005-05-24
- Last updated
- 2023-03-24
- Certified
- 2023-03-24
Frequently asked questions
- What is Catherine Biren's NPI number?
- Catherine Biren's National Provider Identifier (NPI) is 1124021035, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Catherine Biren's specialty?
- Catherine Biren is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Catherine Biren located?
- Catherine Biren's practice location on file with NPPES is 1324 Nelson Ave, Modesto, CA 95350-5341.
- What is Catherine Biren's phone number?
- The practice phone number listed in the NPPES registry for Catherine Biren is (209) 524-9481.
- Does Catherine Biren accept Medicare?
- Catherine Biren is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Catherine Biren's NPI active?
- Yes — Catherine Biren's NPI (1124021035) is active in the NPPES registry as of the last update on 2023-03-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.