Mark Illeman, FNP
NPI 1548388861 · Family Nurse Practitioner · San Francisco, CA
Mark Illeman, FNP is a Family Nurse Practitioner provider in San Francisco, CA (NPI 1548388861).
Provider details
- NPI number
- 1548388861
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Male
- Sole proprietor
- No
- License
- 2005 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
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
- 2007-03-26
- Last updated
- 2015-06-19
Frequently asked questions
- What is Mark Illeman's NPI number?
- Mark Illeman's National Provider Identifier (NPI) is 1548388861, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Illeman's specialty?
- Mark Illeman is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mark Illeman located?
- Mark Illeman's practice location on file with NPPES is 2300 California St, San Francisco, CA 94115-2753.
- What is Mark Illeman's phone number?
- The practice phone number listed in the NPPES registry for Mark Illeman is (415) 202-1550.
- Is Mark Illeman's NPI active?
- Yes — Mark Illeman's NPI (1548388861) is active in the NPPES registry as of the last update on 2015-06-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.