Belton Douglas Hallmark, M.D.
Family Medicine Physician · Castle Rock, CO
Belton Douglas Hallmark, M.D. is a family medicine physician with a practice address in Castle Rock, Colorado, and NPI 1225018633, issued on Jan 20, 2006. Check the license (Colorado 23157, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Belton Douglas Hallmark
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 23157 CO
Self-reported in NPPES; status is on the state search - Practice location
- 1189 S Perry St Ste 230, Castle Rock, CO 80104
- Phone
- (303) 688-3434
- Enumerated
- Jan 20, 2006
- Record last updated
- Jul 11, 2023
- Fax
- (303) 688-4454
- Medicaid ID
- 01231570 CO
- Medicare enrollment
- Enrolled (PECOS I20050117000355); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical Branch At Galveston, 1979
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 3,563 in Colorado → Look up another NPI →
Also registered at 1189 S Perry St Ste 230
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kerri Rathke, NPNurse Practitioner1669085221
Verify Belton Douglas Hallmark in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 23157Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
35% more Medicare Part D claims than the average family medicine physician in 2024
4,780 Medicare Part D claims for 270 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 217 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium215 claims
- Levothyroxine Sodium213 claims
- Gabapentin164 claims
- Olmesartan Medoxomil146 claims
- Diclofenac Sodium142 claims
- Tramadol Hcl133 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): 38.3 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: $2,712.27
85 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. 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.
Belton Douglas Hallmark among 3,563 family medicine physician records in Colorado
Belton Douglas Hallmark, M.D. is one of 3,563 family medicine physician records with a practice address in Colorado. 76% 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 12% of them.
- NPI issued2006 · 12% of these records are older, 56% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated1979 · median 2008 among the 2,077 with a school on file
- Record last updated2023 · 58% 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 Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
45 family medicine physician records list a practice address in Castle Rock
They are 45 of the 1,319 NPPES records with a practice address in Castle Rock, and 3,563 family medicine physician records in Colorado.
All 3,563 in Colorado → Every provider in Castle Rock → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- John Campbell, M.D.Castle Rock, CO 801041053373415
- Christopher Carpenter, M.D.Castle Rock, CO 801041508846023
- Ann Engel, M.D.Castle Rock, CO 801041285743385
- Jack England, D.O.Castle Rock, CO 801041609856749
- Deborah Fromm, MDCastle Rock, CO 801041467492090
- Louis Kasunic, D.O.Castle Rock, CO 801041912083296
- Doris Kleinert, M.D.Castle Rock, CO 801041861474751
- Preston Nein, M.D.Castle Rock, CO 801041194807404
Common questions
What is Belton Douglas Hallmark, M.D.'s NPI number?
Belton Douglas Hallmark, M.D.'s National Provider Identifier (NPI) is 1225018633, issued on Jan 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Belton Douglas Hallmark, M.D. located?
The NPPES record lists a practice address at 1189 S Perry St Ste 230, Castle Rock, CO, 80104. Phone: (303) 688-3434. Providers update this record themselves, so call before visiting.
How can I verify Belton Douglas Hallmark, M.D.'s license?
NPPES lists Colorado license number 23157, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Belton Douglas Hallmark, M.D. prescribe under Medicare Part D?
In 2024, Belton Douglas Hallmark, M.D. had 4,780 Medicare Part D claims for 270 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Belton Douglas Hallmark, M.D.'s MIPS final score?
The 2023 MIPS final score is 38.3 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.