Austin J Ma, M.D., a Professional Corporation
NPI 1174685846 · Hematology & Oncology Physician · Los Angeles, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Austin J Ma, M.D., a Professional Corporation is a Hematology & Oncology Physician organization in Los Angeles, CA (NPI 1174685846).
Provider details
- NPI number
- 1174685846
- Entity type
- Organization
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Austin Ma, President(323) 264-0430
- License
- 207RH0003X (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Other names (DBA / former)
- Doing business as
- Hematology Oncology Specialists
Registry dates
- Enumerated
- 2006-12-15
- Last updated
- 2016-04-20
Frequently asked questions
- What is Austin J Ma, M.D., a Professional Corporation's NPI number?
- Austin J Ma, M.D., a Professional Corporation's National Provider Identifier (NPI) is 1174685846, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Austin J Ma, M.D., a Professional Corporation?
- Austin J Ma, M.D., a Professional Corporation is classified in the NPPES registry as Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Austin J Ma, M.D., a Professional Corporation located?
- Austin J Ma, M.D., a Professional Corporation's practice location on file with NPPES is 1700 E Cesar E Chavez Ave, Los Angeles, CA 90033-2480.
- What is Austin J Ma, M.D., a Professional Corporation's phone number?
- The practice phone number listed in the NPPES registry for Austin J Ma, M.D., a Professional Corporation is (323) 264-0430.
- Does Austin J Ma, M.D., a Professional Corporation accept Medicare?
- Austin J Ma, M.D., a Professional Corporation is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Austin J Ma, M.D., a Professional Corporation?
- The authorized official listed on Austin J Ma, M.D., a Professional Corporation's NPPES record is Austin Ma, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Austin J Ma, M.D., a Professional Corporation's NPI active?
- Yes — Austin J Ma, M.D., a Professional Corporation's NPI (1174685846) is active in the NPPES registry as of the last update on 2016-04-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.