Timothy Grant McNaughton, M.D
General Practice Physician · Apple Valley, CA
Timothy Grant McNaughton, M.D is a general practice physician with a practice address in Apple Valley, California, and NPI 1124062039, issued on Jun 15, 2006. Check the license (California A78159, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Timothy Grant McNaughton
- Credential
- M.D
- Primary taxonomy
- General Practice Physician 208D00000X
- License number
- A78159 CA
Self-reported in NPPES; status is on the state search - Practice location
- 18300 Highway 18, Apple Valley, CA 92307
- Phone
- (760) 242-2311
- Enumerated
- Jun 15, 2006
- Record last updated
- Apr 19, 2022
- Medicaid ID
- 00A781590 CA
- Medicare enrollment
- Enrolled (PECOS I20050225000830); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 2000
- Entity
- Type 1 · individual
8 nearest general practice physician records → All 1,956 in California → Look up another NPI →
Also registered at 18300 Highway 18
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Timothy Grant McNaughton in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A78159Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% fewer Medicare Part D claims than the average general practice physician in 2024
1,320 Medicare Part D claims for 205 beneficiaries, against an average of 3,030 among the 8,395 providers of this specialty who prescribed in Part D.
Most prescribed
- Levothyroxine Sodium135 claims
- Tamsulosin Hcl71 claims
- Metformin Hcl70 claims
- Amlodipine Besylate58 claims
- Omeprazole50 claims
- Potassium Chloride34 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 94.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $54.25
2 payments; by number, the most common kind was food and beverage; the largest payer was Solventum Corporation. The 4,259 providers of this specialty with any payment received $1,273.40 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Medamerica Physician Solutions PCRedlands, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Timothy Grant McNaughton among 1,956 general practice physician records in California
Timothy Grant McNaughton, M.D is one of 1,956 general practice physician records with a practice address in California. 48% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 66% newer
- In a Medicare fileYes · 48% of these records are
- In the CMS Doctors and Clinicians fileYes · 27% of these records are
- Graduated2000 · median 1994 among the 520 with a school on file
- Record last updated2022 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208D00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
General Practice Physician providers in California
There are 1,956 general practice physician records in California.
All 1,956 in California → Every provider in Apple Valley → General Practice Physician nationwide →
The 8 general practice physician records with the nearest ZIP codes
- Hannibal Edwards, M.D.Apple Valley, CA 923071760808539
- Nancy Jones, D..O.Apple Valley, CA 923071396733036
- Ziad Sawan, MDApple Valley, CA 923071912958786
- Crystal Donders, DOFort Irwin, CA 923101194318741
- Bryan Fletcher, DOFort Irwin, CA 923101164804605
- Edward Wang, M.D.Fort Irwin, CA 923101811262884
- Ariel Garcia, M.D.Grand Terrace, CA 923131164648457
- Heidi Biedebach, MDBig Bear Lake, CA 923151689907628
Common questions
What is Timothy Grant McNaughton, M.D's NPI number?
Timothy Grant McNaughton, M.D's National Provider Identifier (NPI) is 1124062039, issued on Jun 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Timothy Grant McNaughton, M.D located?
The NPPES record lists a practice address at 18300 Highway 18, Apple Valley, CA, 92307. Phone: (760) 242-2311. Providers update this record themselves, so call before visiting.
How can I verify Timothy Grant McNaughton, M.D's license?
NPPES lists California license number A78159, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Timothy Grant McNaughton, M.D prescribe under Medicare Part D?
In 2024, Timothy Grant McNaughton, M.D had 1,320 Medicare Part D claims for 205 beneficiaries; the average among general practice physician prescribers was 3,030. Part D covers Medicare prescriptions only.
What is Timothy Grant McNaughton, M.D's MIPS final score?
The 2023 MIPS final score is 94.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.