Chelsea Ma, MD
NPI 1871936575 · Dermatology Physician · Stanford, CA
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Chelsea Ma, MD is a Dermatology Physician provider in Stanford, CA (NPI 1871936575).
Provider details
- NPI number
- 1871936575
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 264303 (MA)
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 tenure25% of score
13 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
5,119 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 | 2,815 | $4 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 554 | $83 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 474 | $120 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 407 | $62 |
| Destruction of Skin Growth, 1-14 Growths17110 | 206 | $100 |
| Biopsy of Related Skin Growth, First Growth |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ketoconazole | 178 | 70 |
| Clobetasol Propionate | 109 | 57 |
| Triamcinolone Acetonide | 93 | 67 |
| Hydrocortisone | 87 | 61 |
| Fluocinonide | 78 | 56 |
| Dupilumabbrand: Dupixent Pen | 71 | — |
| Doxycycline Hyclate | 69 | 23 |
| Tretinoin | 50 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$668 across 6 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 (3)
- 440 Broadway St Fl B4Redwood City, CA 94063-3123Phone: (650) 721-3476
- 3301 C St Ste 1400Sacramento, CA 95816-3367Phone: (916) 734-6795
- 1 Deaconess RdBoston, MA 02215-5321Phone: (617) 667-7000
Registry dates
- Enumerated
- 2013-04-11
- Last updated
- 2024-04-16
- Certified
- 2024-04-16
Frequently asked questions
- What is Chelsea Ma's NPI number?
- Chelsea Ma's National Provider Identifier (NPI) is 1871936575, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Chelsea Ma's specialty?
- Chelsea Ma is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Chelsea Ma located?
- Chelsea Ma's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Chelsea Ma's phone number?
- The practice phone number listed in the NPPES registry for Chelsea Ma is (650) 723-4000.
- Does Chelsea Ma accept Medicare?
- Chelsea Ma is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Chelsea Ma's NPI active?
- Yes — Chelsea Ma's NPI (1871936575) is active in the NPPES registry as of the last update on 2024-04-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.