Clark Kulig, MD
NPI 1669423430 · Gastroenterology Physician · Denver, CO
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Clark Kulig, MD is a Gastroenterology Physician provider in Denver, CO (NPI 1669423430).
Provider details
- NPI number
- 1669423430
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- DR.39951 (CO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
113 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 High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 38 | $143 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 37 | $95 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 25 | $175 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 13 | $216 |
Typical Medicare-allowed amounts for these services range $95–$216 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Spironolactone | 68 | 20 |
| Furosemide | 67 | 20 |
| Ursodiol | 65 | 16 |
| Lactulose | 53 | 21 |
| Pantoprazole Sodium | 41 | 11 |
| Rifaximinbrand: Xifaxan | 40 | — |
| Tacrolimus | 39 | — |
| Mycophenolate Mofetil | 29 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$806 across 13 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
Additional practice locations (1)
- 1719 E 19th Ave # 5050Denver, CO 80218-1235Phone: (720) 754-2155Fax: (303) 830-1135
Registry dates
- Enumerated
- 2006-05-15
- Last updated
- 2025-02-05
- Certified
- 2025-02-05
Frequently asked questions
- What is Clark Kulig's NPI number?
- Clark Kulig's National Provider Identifier (NPI) is 1669423430, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Clark Kulig's specialty?
- Clark Kulig is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Clark Kulig located?
- Clark Kulig's practice location on file with NPPES is 2535 S Downing St Ste 380, Denver, CO 80210-5850.
- What is Clark Kulig's phone number?
- The practice phone number listed in the NPPES registry for Clark Kulig is (303) 778-5797.
- Does Clark Kulig accept Medicare?
- Clark Kulig is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Clark Kulig's NPI active?
- Yes — Clark Kulig's NPI (1669423430) is active in the NPPES registry as of the last update on 2025-02-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.