Mark D. Spencer, MD
Family Medicine Physician · Wendell, ID
Mark D. Spencer, MD is a family medicine physician with a practice address in Wendell, Idaho, and NPI 1497719728, issued on Apr 13, 2006. Check the license (Idaho M4484, as entered in NPPES) on the Idaho Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Mark D. Spencer
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- M4484 ID
Self-reported in NPPES; status is on the state search - Practice location
- 410 N Idaho St, Wendell, ID 83355
- Phone
- (208) 990-3226
- Enumerated
- Apr 13, 2006
- Record last updated
- Jun 11, 2025
- Fax
- (888) 440-7959
- Medicare enrollment
- Enrolled (PECOS I20120322000523); may accept Medicare assignment
- Medical or professional school
- University Of Washington School Of Medicine, 1979
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 1,316 in Idaho → Look up another NPI →
Also registered at 410 N Idaho St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jeremiah Funk, DDSDentist1649535493
- Jack Kulm, DMD PADentist1275641540
- Samantha Marshall, MDInternal Medicine Physician1467410837
Verify Mark D. Spencer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIdaho Board of Medicine
Search for license M4484Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.0 times the Medicare Part D claims of the average family medicine physician in 2024
10,701 Medicare Part D claims for 619 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 405 claims were for opioids.
Most prescribed
- Levothyroxine Sodium351 claims
- Tamsulosin Hcl286 claims
- Amlodipine Besylate275 claims
- Lisinopril271 claims
- Omeprazole271 claims
- Atorvastatin Calcium266 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.
Industry payments in 2024: $16.18
1 payment: food and beverage; the largest payer was Grifols USA, LLC. The 55,478 providers of this specialty with any payment received $902.55 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.
Mark D. Spencer among 1,316 family medicine physician records in Idaho
Mark D. Spencer, MD is one of 1,316 family medicine physician records with a practice address in Idaho. 78% 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 9% of them.
- NPI issued2006 · 9% of these records are older, 57% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1979 · median 2009 among the 793 with a school on file
- Record last updated2025 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Idaho practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Family Medicine Physician providers in Idaho
There are 1,316 family medicine physician records in Idaho.
The 8 family medicine physician records with the nearest ZIP codes
- Keith Davis, M.D.Shoshone, ID 833521043277635
- Christopher Burns, MDRupert, ID 833501932738846
- Lanny Campbell, MDRupert, ID 833501780790147
- Charles Clair, MDRupert, ID 833501003012204
- Mark Dahle, MDRupert, ID 833501174187587
- Aleksandr Doroshkin, MDRupert, ID 833501073171781
- Dawn Jennings, MDRupert, ID 833501437350774
- Janet King, RN NPRupert, ID 833501578550547
Common questions
What is Mark D. Spencer, MD's NPI number?
Mark D. Spencer, MD's National Provider Identifier (NPI) is 1497719728, issued on Apr 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark D. Spencer, MD located?
The NPPES record lists a practice address at 410 N Idaho St, Wendell, ID, 83355. Phone: (208) 990-3226. Providers update this record themselves, so call before visiting.
How can I verify Mark D. Spencer, MD's license?
NPPES lists Idaho license number M4484, as entered by the provider. Search the Idaho Board of Medicine at https://dopl.idaho.gov/bom/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark D. Spencer, MD prescribe under Medicare Part D?
In 2024, Mark D. Spencer, MD had 10,701 Medicare Part D claims for 619 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
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.