Gregory J Porter MD Inc
NPI 1588849954 · Anesthesiology Physician · Grass Valley, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory J Porter MD Inc is a Anesthesiology Physician organization in Grass Valley, CA (NPI 1588849954).
Provider details
- NPI number
- 1588849954
- Entity type
- Organization
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Gregory Porter, President(714) 347-1010
- License
- G72310 (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 tenure38% of score
18 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
Registry dates
- Enumerated
- 2008-01-04
- Last updated
- 2023-10-11
- Certified
- 2023-10-11
Frequently asked questions
- What is Gregory J Porter MD Inc's NPI number?
- Gregory J Porter MD Inc's National Provider Identifier (NPI) is 1588849954, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Gregory J Porter MD Inc?
- Gregory J Porter MD Inc is classified in the NPPES registry as Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory J Porter MD Inc located?
- Gregory J Porter MD Inc's practice location on file with NPPES is 400 Sierra College Dr Ste B, Grass Valley, CA 95945-5093.
- What is Gregory J Porter MD Inc's phone number?
- The practice phone number listed in the NPPES registry for Gregory J Porter MD Inc is (530) 272-3428.
- Does Gregory J Porter MD Inc accept Medicare?
- Gregory J Porter MD Inc 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 Gregory J Porter MD Inc?
- The authorized official listed on Gregory J Porter MD Inc's NPPES record is Gregory Porter, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Gregory J Porter MD Inc's NPI active?
- Yes — Gregory J Porter MD Inc's NPI (1588849954) is active in the NPPES registry as of the last update on 2023-10-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.