Robert Greer, M.D.
NPI 1174943146 · Pulmonary Disease Physician · Carmichael, CA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Greer, M.D. is a Pulmonary Disease Physician provider in Carmichael, CA (NPI 1174943146).
Provider details
- NPI number
- 1174943146
- Entity type
- Individual
- Primary specialty
- Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A168700 (CA)
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
12 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
372 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) |
|---|---|---|
| Critical Care, First 30-74 Minutes99291 | 157 | $222 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 122 | $126 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 34 | $183 |
| Emergent Insertion of Breathing Tube Into Windpipe Using an Endoscope31500 | 24 | $142 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 24 | $84 |
| Insertion of Non-Tunneled Central Venous Tube for Infusion (5 Years Or Older)36556 | 11 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2014-04-17
- Last updated
- 2023-11-22
- Certified
- 2023-11-22
Frequently asked questions
- What is Robert Greer's NPI number?
- Robert Greer's National Provider Identifier (NPI) is 1174943146, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Greer's specialty?
- Robert Greer is listed in the NPPES registry with a primary specialty of Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Greer located?
- Robert Greer's practice location on file with NPPES is 6555 Coyle Ave Ste 215, Carmichael, CA 95608-0303.
- What is Robert Greer's phone number?
- The practice phone number listed in the NPPES registry for Robert Greer is (916) 536-2442.
- Does Robert Greer accept Medicare?
- Robert Greer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Greer's NPI active?
- Yes — Robert Greer's NPI (1174943146) is active in the NPPES registry as of the last update on 2023-11-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.