Mark Gruidl, NP
NPI 1427045848 · Nurse Practitioner · Templeton, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Gruidl, NP is a Nurse Practitioner provider in Templeton, CA (NPI 1427045848).
Provider details
- NPI number
- 1427045848
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Male
- Sole proprietor
- Yes
- License
- NP8286 (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 tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
3,642 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 1,235 | $89 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 1,053 | $89 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 372 | $62 |
| Residence Visit for Established Patient With Low Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99348 | 368 | $63 |
| Residence Visit for Established Patient With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99349 | 292 | $105 |
| Advance Care Planning, First 30 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 48 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Trazodone Hcl | 227 | 15 |
| Citalopram Hydrobromidebrand: Citalopram Hbr | 202 | 13 |
| Furosemide | 191 | — |
| Oxycodone Hcl | 127 | — |
| Potassium Chloride | 123 | — |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 119 | 21 |
| Divalproex Sodium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-09-30
- Last updated
- 2012-01-04
Frequently asked questions
- What is Mark Gruidl's NPI number?
- Mark Gruidl's National Provider Identifier (NPI) is 1427045848, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Gruidl's specialty?
- Mark Gruidl is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mark Gruidl located?
- Mark Gruidl's practice location on file with NPPES is 1020 Fava Ct, Templeton, CA 93465-3826.
- What is Mark Gruidl's phone number?
- The practice phone number listed in the NPPES registry for Mark Gruidl is (805) 748-8897.
- Does Mark Gruidl accept Medicare?
- Mark Gruidl is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Gruidl's NPI active?
- Yes — Mark Gruidl's NPI (1427045848) is active in the NPPES registry as of the last update on 2012-01-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.