Joan Ma, M.D.
NPI 1902285380 · Emergency Medicine Physician · New York, NY
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joan Ma, M.D. is a Emergency Medicine Physician provider in New York, NY (NPI 1902285380).
Provider details
- NPI number
- 1902285380
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 61345 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
11 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
225 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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 136 | $208 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 89 | $143 |
Typical Medicare-allowed amounts for these services range $143–$208 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (3)
- 80 Seymour StreetHartford, CT 06102Phone: (860) 679-4988
- 100 Grand StNew Britain, CT 06052-2016Phone: (860) 224-5011
- 55 Palmer AveBronxville, NY 10708-3403Phone: (914) 787-1000
Registry dates
- Enumerated
- 2015-05-19
- Last updated
- 2019-08-07
Frequently asked questions
- What is Joan Ma's NPI number?
- Joan Ma's National Provider Identifier (NPI) is 1902285380, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joan Ma's specialty?
- Joan Ma is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Joan Ma located?
- Joan Ma's practice location on file with NPPES is 622 W 168th St, New York, NY 10032-3720.
- What is Joan Ma's phone number?
- The practice phone number listed in the NPPES registry for Joan Ma is (212) 305-2500.
- Does Joan Ma accept Medicare?
- Joan Ma is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joan Ma's NPI active?
- Yes — Joan Ma's NPI (1902285380) is active in the NPPES registry as of the last update on 2019-08-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.