Kenneth Grier, M.D.
NPI 1114235744 · Family Medicine Physician · Apple Valley, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kenneth Grier, M.D. is a Family Medicine Physician provider in Apple Valley, CA (NPI 1114235744).
Provider details
- NPI number
- 1114235744
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A150771 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
15 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
505 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 174 | $131 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 161 | $93 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 85 | $133 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 27 | $115 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 26 | $93 |
| Telephone Medical Discussion With Physician, 5-10 Minutes99441 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 152 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 344 | 137 |
| Amlodipine Besylate | 342 | 115 |
| Levothyroxine Sodium | 252 | 80 |
| Lisinopril | 239 | 89 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 231 | 85 |
| Gabapentin | 213 | 81 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$425 across 22 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-09-16
- Last updated
- 2020-10-02
- Certified
- 2020-10-02
Frequently asked questions
- What is Kenneth Grier's NPI number?
- Kenneth Grier's National Provider Identifier (NPI) is 1114235744, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kenneth Grier's specialty?
- Kenneth Grier is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Kenneth Grier located?
- Kenneth Grier's practice location on file with NPPES is 18564 US Highway 18 Ste 101, Apple Valley, CA 92307-2320.
- What is Kenneth Grier's phone number?
- The practice phone number listed in the NPPES registry for Kenneth Grier is (760) 242-7777.
- Does Kenneth Grier accept Medicare?
- Kenneth Grier is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kenneth Grier's NPI active?
- Yes — Kenneth Grier's NPI (1114235744) is active in the NPPES registry as of the last update on 2020-10-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.