Clark C. Kulig, MD
Gastroenterology Physician · Denver, CO
Clark C. Kulig, MD is a gastroenterology physician with a practice address in Denver, Colorado, and NPI 1669423430, issued on May 15, 2006. Check the license (Colorado DR.39951, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Clark C. Kulig
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- DR.39951 CO
Self-reported in NPPES; status is on the state search - Practice location
- 2535 S Downing St Ste 380, Denver, CO 80210
- Phone
- (303) 778-5797
- Enumerated
- May 15, 2006
- Record last updated
- Feb 5, 2025
- Fax
- (303) 778-5205
- Medicaid ID
- 99350777 CO
- Medicare enrollment
- Enrolled (PECOS I20060802000468); accepts Medicare assignment
- Medical or professional school
- University Of Wisconsin School Of Medicine, 1998
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 334 in Colorado → Look up another NPI →
Also registered at 2535 S Downing St Ste 380
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Clark C. Kulig in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license DR.39951Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15% fewer Medicare Part D claims than the average gastroenterology physician in 2024
692 Medicare Part D claims for 112 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Spironolactone68 claims
- Furosemide67 claims
- Ursodiol65 claims
- Lactulose53 claims
- Pantoprazole Sodium41 claims
- Xifaxan40 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): 58.5 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: $806.11
13 payments; by number, the most common kind was food and beverage; the largest payer was Gilead Sciences, Inc. The 13,350 providers of this specialty with any payment received $5,015.95 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
- Portercare Adventist Health SystemGrand Junction, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Clark C. Kulig among 334 gastroenterology physician records in Colorado
Clark C. Kulig, MD is one of 334 gastroenterology physician records with a practice address in Colorado. 84% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 53% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated1998 · median 2003 among the 258 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 207RG0100X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Colorado
There are 334 gastroenterology physician records in Colorado.
All 334 in Colorado → Every provider in Denver → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Keith Garrison, MDDenver, CO 802101245868637
- Praneeth Kudaravalli, MDDenver, CO 802101629495973
- Vihang Patel, M.D.Denver, CO 802101184967598
- Barry Ross, M.D.Denver, CO 802101699714931
- Augustin Attwell, MDLakewood, CO 802141275620304
- Arash Babaei, M.D.Denver, CO 802061598716482
- Rajesh Jain, M.D.Lakewood, CO 802141811922339
- Jeffrey King, M.D.Denver, CO 802061194901942
Common questions
What is Clark C. Kulig, MD's NPI number?
Clark C. Kulig, MD's National Provider Identifier (NPI) is 1669423430, issued on May 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Clark C. Kulig, MD located?
The NPPES record lists a practice address at 2535 S Downing St Ste 380, Denver, CO, 80210. Phone: (303) 778-5797. Providers update this record themselves, so call before visiting.
How can I verify Clark C. Kulig, MD's license?
NPPES lists Colorado license number DR.39951, 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 Clark C. Kulig, MD prescribe under Medicare Part D?
In 2024, Clark C. Kulig, MD had 692 Medicare Part D claims for 112 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Clark C. Kulig, MD's MIPS final score?
The 2023 MIPS final score is 58.5 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.