Lake Forest Medical Group, Inc.
NPI 1558429092 · Family Medicine Physician · Lake Forest, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lake Forest Medical Group, Inc. is a Family Medicine Physician organization in Lake Forest, CA (NPI 1558429092).
Provider details
- NPI number
- 1558429092
- Entity type
- Organization
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- John Koumas, Owner(949) 770-1950
- License
- 20A5515 (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
19 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
- 2006-12-05
- Last updated
- 2008-09-17
Frequently asked questions
- What is Lake Forest Medical Group, Inc.'s NPI number?
- Lake Forest Medical Group, Inc.'s National Provider Identifier (NPI) is 1558429092, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Lake Forest Medical Group, Inc.?
- Lake Forest Medical Group, Inc. is classified in the NPPES registry as Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Lake Forest Medical Group, Inc. located?
- Lake Forest Medical Group, Inc.'s practice location on file with NPPES is 24401 Muirlands Blvd, Lake Forest, CA 92630-3948.
- What is Lake Forest Medical Group, Inc.'s phone number?
- The practice phone number listed in the NPPES registry for Lake Forest Medical Group, Inc. is (949) 770-1950.
- Does Lake Forest Medical Group, Inc. accept Medicare?
- Lake Forest Medical Group, 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 Lake Forest Medical Group, Inc.?
- The authorized official listed on Lake Forest Medical Group, Inc.'s NPPES record is John Koumas, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Lake Forest Medical Group, Inc.'s NPI active?
- Yes — Lake Forest Medical Group, Inc.'s NPI (1558429092) is active in the NPPES registry as of the last update on 2008-09-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.