Physician Profile
Unclaimed ProfileAbout SITARIK
Based in Boulder, CO, Mark Anthony Sitarik, MD is listed in the NPI registry under hematology/oncology. Mark graduated from Hahneman Medical College of the Pacific in 1982. Mark is also listed as specializing in hematology & oncology. According to Medicare claims data, Mark cared for 1,380 Medicare patients across 31,181 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (303) 385-2000
- Email not available
Practice Locations
4715 ARAPAHOE AVE
Boulder, CO 80303
Procedures Most Often Billed to Medicare
31,181 services · 1,380 patients · 25 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Administration of chemotherapy into vein, 1 hour or less | Treatment | 96413 |
198 |
| Injection of additional new drug or substance into vein | Treatment | 96375 |
173 |
| Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less | Treatment | 96365 |
135 |
| Infusion into a vein for therapy, prevention, or diagnosis, additional sequential infusion, 1 hour or less | Treatment | 96367 |
119 |
| Administration of non-hormonal anti-neoplastic chemotherapy under skin or into muscle | Treatment | 96401 |
93 |
| Administration of chemotherapy into vein, each additional hour | Treatment | 96415 |
66 |
| Injection of drug or substance under skin or into muscle | Treatment | 96372 |
65 |
| Injection, pembrolizumab, 1 mg | Drug given | J9271 |
7,700 |
| Injection, daratumumab, 10 mg and hyaluronidase-fihj | Drug given | J9144 |
7,020 |
| Injection, paclitaxel, 1 mg | Drug given | J9267 |
3,270 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other hematology/oncology specialists at this location 3
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 17 related providers in 3 groups
Trained at Hahneman Medical College of the Pacific 4
Other providers in the same specialty who trained at the same institution.
Class of 1982 at Hahneman Medical College of the Pacific 5
Providers who graduated from the same medical school in the same year.
Also performs Administration of chemotherapy into vein, 1 hour or less 8
Providers in CO who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Sitarik?
Dr. Sitarik is a hematology/oncology in Boulder, CO. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “HEMATOLOGY/ONCOLOGY”.
NPI registry
What is Dr. Sitarik's address?
Dr. Sitarik is listed at 4715 ARAPAHOE AVE, Boulder, CO 80303. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Sitarik?
The number on file is (303) 385-2000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Sitarik's NPI number?
Dr. Sitarik's National Provider Identifier is 1346224664. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Sitarik train?
Dr. Sitarik attended Hahneman Medical College of the Pacific, graduating in 1982. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Sitarik been practicing?
Dr. Sitarik has 44 years experience. Calculated from a graduation year of 1982, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Sitarik perform?
According to Medicare billing data, Dr. Sitarik provides treatments such as administration of chemotherapy into vein, 1 hour or less and injection of additional new drug or substance into vein, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Sitarik confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Sitarik. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.