Thomas C Guyn MD Inc
NPI 1861766560 · Internal Medicine Physician · Santa Rosa, CA
Thomas C Guyn MD Inc is a Internal Medicine Physician organization in Santa Rosa, CA (NPI 1861766560).
Provider details
- NPI number
- 1861766560
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Thomas Guyn, Physician(952) 936-7736
- License
- A42640 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 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
- 2012-02-28
- Last updated
- 2012-02-28
Frequently asked questions
- What is Thomas C Guyn MD Inc's NPI number?
- Thomas C Guyn MD Inc's National Provider Identifier (NPI) is 1861766560, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Thomas C Guyn MD Inc?
- Thomas C Guyn MD Inc is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas C Guyn MD Inc located?
- Thomas C Guyn MD Inc's practice location on file with NPPES is 1165 Montgomery Dr, Santa Rosa, CA 95405-4801.
- What is Thomas C Guyn MD Inc's phone number?
- The practice phone number listed in the NPPES registry for Thomas C Guyn MD Inc is (707) 525-5300.
- Who is the authorized official for Thomas C Guyn MD Inc?
- The authorized official listed on Thomas C Guyn MD Inc's NPPES record is Thomas Guyn, Physician. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Thomas C Guyn MD Inc's NPI active?
- Yes — Thomas C Guyn MD Inc's NPI (1861766560) is active in the NPPES registry as of the last update on 2012-02-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.