Ruhong Ma, D.O.
NPI 1063679587 · Internal Medicine Physician · San Diego, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ruhong Ma, D.O. is a Internal Medicine Physician provider in San Diego, CA (NPI 1063679587).
Provider details
- NPI number
- 1063679587
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- OP61335231 (WA)
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 tenure28% of score
18 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
211 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) |
|---|---|---|
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 211 | $131 |
Typical Medicare-allowed amounts for these services range $131–$131 (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 (1)
- 354 Santa Fe DrEncinitas, CA 92024-5142Phone: (760) 230-2251Fax: (760) 230-2253
Registry dates
- Enumerated
- 2008-05-21
- Last updated
- 2022-08-11
- Certified
- 2022-08-11
Frequently asked questions
- What is Ruhong Ma's NPI number?
- Ruhong Ma's National Provider Identifier (NPI) is 1063679587, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ruhong Ma's specialty?
- Ruhong Ma is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ruhong Ma located?
- Ruhong Ma's practice location on file with NPPES is 4647 Zion Ave, San Diego, CA 92120.
- What is Ruhong Ma's phone number?
- The practice phone number listed in the NPPES registry for Ruhong Ma is (619) 528-5435.
- Does Ruhong Ma accept Medicare?
- Ruhong Ma is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ruhong Ma's NPI active?
- Yes — Ruhong Ma's NPI (1063679587) is active in the NPPES registry as of the last update on 2022-08-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.