Jonathan Ma, M.D.
NPI 1881937142 · Anesthesiology Physician · Modesto, CA
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jonathan Ma, M.D. is a Anesthesiology Physician provider in Modesto, CA (NPI 1881937142).
Provider details
- NPI number
- 1881937142
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A147253 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
13 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
293 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) |
|---|---|---|
| Anesthesia for Other Procedure on Esophagus, Stomach, Or Upper Small Bowel Using an Endoscope00731 | 57 | $143 |
| Anesthesia for Exam of Colon Using an Endoscope00812 | 56 | $115 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 28 | $132 |
| Anesthesia for Procedure on Small and Large Bowel Using an Endoscope00813 | 26 | $170 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 20 | $96 |
| Anesthesia for Other Procedure on Upper Abdomen00790 | 19 |
Practice location
Mailing address
Additional practice locations (1)
- 4530 Constance StNew Orleans, LA 70115-1528Phone: (925) 360-8888
Registry dates
- Enumerated
- 2013-04-04
- Last updated
- 2018-03-17
Frequently asked questions
- What is Jonathan Ma's NPI number?
- Jonathan Ma's National Provider Identifier (NPI) is 1881937142, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jonathan Ma's specialty?
- Jonathan Ma is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Jonathan Ma located?
- Jonathan Ma's practice location on file with NPPES is 600 Coffee Rd, Modesto, CA 95355-4201.
- What is Jonathan Ma's phone number?
- The practice phone number listed in the NPPES registry for Jonathan Ma is (209) 524-1211.
- Does Jonathan Ma accept Medicare?
- Jonathan Ma is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jonathan Ma's NPI active?
- Yes — Jonathan Ma's NPI (1881937142) is active in the NPPES registry as of the last update on 2018-03-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.