Matthew Greer, M.D.
NPI 1588929756 · Emergency Medicine Physician · Sacramento, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Matthew Greer, M.D. is a Emergency Medicine Physician provider in Sacramento, CA (NPI 1588929756).
Provider details
- NPI number
- 1588929756
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A134072 (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
327 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 | 109 | $172 |
| Critical Care, First 30-74 Minutes99291 | 88 | $212 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 79 | $119 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 24 | $70 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 14 | $80 |
| Insertion of Artery Tube for Blood Sampling Or Infusion Through Skin36620 | 13 | $43 |
Practice location
Mailing address
Additional practice locations (1)
- 1700 Mount Vernon AveBakersfield, CA 93306-4018Phone: (661) 326-2000
Registry dates
- Enumerated
- 2012-07-12
- Last updated
- 2018-04-11
Frequently asked questions
- What is Matthew Greer's NPI number?
- Matthew Greer's National Provider Identifier (NPI) is 1588929756, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Greer's specialty?
- Matthew Greer is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Matthew Greer located?
- Matthew Greer's practice location on file with NPPES is 2315 Stockton Blvd, Sacramento, CA 95817-2201.
- What is Matthew Greer's phone number?
- The practice phone number listed in the NPPES registry for Matthew Greer is (916) 734-8249.
- Does Matthew Greer accept Medicare?
- Matthew Greer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Matthew Greer's NPI active?
- Yes — Matthew Greer's NPI (1588929756) is active in the NPPES registry as of the last update on 2018-04-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.