Huan C Guu MD a Professional Corporation
NPI 1851550859 · Internal Medicine Physician · Mission Viejo, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Huan C Guu MD a Professional Corporation is a Internal Medicine Physician organization in Mission Viejo, CA (NPI 1851550859).
Provider details
- NPI number
- 1851550859
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Huan Guu, President(949) 500-8589
- License
- A62481 (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
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
- 2008-06-04
- Last updated
- 2009-03-31
Frequently asked questions
- What is Huan C Guu MD a Professional Corporation's NPI number?
- Huan C Guu MD a Professional Corporation's National Provider Identifier (NPI) is 1851550859, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Huan C Guu MD a Professional Corporation?
- Huan C Guu MD a Professional Corporation is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Huan C Guu MD a Professional Corporation located?
- Huan C Guu MD a Professional Corporation's practice location on file with NPPES is 27700 Medical Center Rd, Mission Viejo, CA 92691-6426.
- What is Huan C Guu MD a Professional Corporation's phone number?
- The practice phone number listed in the NPPES registry for Huan C Guu MD a Professional Corporation is (949) 500-8589.
- Does Huan C Guu MD a Professional Corporation accept Medicare?
- Huan C Guu MD a Professional Corporation 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 Huan C Guu MD a Professional Corporation?
- The authorized official listed on Huan C Guu MD a Professional Corporation's NPPES record is Huan Guu, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Huan C Guu MD a Professional Corporation's NPI active?
- Yes — Huan C Guu MD a Professional Corporation's NPI (1851550859) is active in the NPPES registry as of the last update on 2009-03-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.