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- 4715 Arapahoe Ave, Boulder, CO 80303
About Dr. Sitarik
Based in Boulder, CO, Mark A. Sitarik, MD is listed in the NPI registry under hematology & oncology. Mark graduated from Hahneman Medical College of the Pacific in 1982. According to Medicare claims data, Mark cared for 1,380 Medicare patients across 31,181 services. The services billed most often include injection, pembrolizumab, 1 mg, injection, daratumumab, 10 mg and hyaluronidase-fihj, and injection, paclitaxel, 1 mg. NPI 1346224664 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (303) 385-2000
- Email not available
Practice Locations
4715 ARAPAHOE AVE
Boulder, CO 80303
Conditions Commonly Evaluated or Treated
Within Hematology and Oncology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Anemia
- Blood clots
- Breast cancer
- Colon cancer
- Iron-deficiency anemia
- Leukemia
- Lung cancer
- Lymphoma
- Prostate cancer
Advanced Cancers
Blood & Lymph Disorders
Blood Cancers
Blood Disorders
- Bleeding Disorders
- Blood Clot in Lung
- Blood Clotting Gene Mutation
- Deep vein thrombosis
- Hemochromatosis
- High Platelet Count
- High White Blood Cell Count
- Low Platelets
- Low White Blood Cell Count
- Thick Blood
- Unexplained Bruising
Blood disorders
- Bone Marrow Scarring
- Hemolytic Anemia in Children
- Pre-Myeloma Protein In Blood
- Vitamin B12 deficiency anemia
Bone & Soft Tissue Cancers
Digestive Cancers
Endocrine Cancers
Endocrine tumors
Gastrointestinal cancer
General oncology
Genetic Blood Disorders
Gynecologic cancer
Gynecologic Cancers
Head & Neck Cancers
Head and neck cancer
Neurologic Cancers
Oncologic emergencies
Ophthalmologic oncology
Skin cancer
Skin Cancers
Urologic Cancers
Procedures & services
Most searched procedures
Biopsies & Diagnostics
Blood disorder care
Cancer Therapies
Cancer therapy
- Chemo allergy desensitization
- Oral chemotherapy management
- Radiation oncology consultation
- Spinal chemo injection
Cellular Therapies
Consultations
Diagnostic testing
Hematology Treatments
Imaging
Infusions
Interventional oncology
Supportive Cancer Care
- Bone Strengthening Injections For Cancer
- Pain Management For Cancer
- Red Blood Cell Booster Shot
- White Blood Cell Booster Injection
Supportive cancer care
- Cancer nutrition counseling
- Chemo brain treatment
- Cold cap therapy for hair loss
- Fertility Preservation for Teens Before Cancer Treatment
- Hyperbaric oxygen for radiation damage
- Lymphedema Drainage Therapy
- Palliative cancer care
Surgical & Vascular Access
- Chemo port placement
- Chemo port removal
- Draining lung fluid
- Paracentesis
- PICC line placement coordination
Testing & Genetics
Vascular access care
Procedures Most Often Billed to Medicare
31,181 services · 1,380 patients · 25 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Administration of chemotherapy into vein, 1 hour or less | Treatment | 96413 |
198 | As often as other peers in Hematology & Oncology |
| Injection of additional new drug or substance into vein | Treatment | 96375 |
173 | As often as other peers in Hematology & Oncology |
| Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less | Treatment | 96365 |
135 | More often than most peers in Hematology & Oncology |
| Infusion into a vein for therapy, prevention, or diagnosis, additional sequential infusion, 1 hour or less | Treatment | 96367 |
119 | As often as other peers in Hematology & Oncology |
| Administration of non-hormonal anti-neoplastic chemotherapy under skin or into muscle | Treatment | 96401 |
93 | As often as other peers in Hematology & Oncology |
| Administration of chemotherapy into vein, each additional hour | Treatment | 96415 |
66 | As often as other peers in Hematology & Oncology |
| Injection of drug or substance under skin or into muscle | Treatment | 96372 |
65 | Less often than most peers in Hematology & Oncology |
| Injection, pembrolizumab, 1 mg | Drug given | J9271 |
7,700 | Less often than most peers in Hematology & Oncology |
| Injection, daratumumab, 10 mg and hyaluronidase-fihj | Drug given | J9144 |
7,020 | As often as other peers in Hematology & Oncology |
| Injection, paclitaxel, 1 mg | Drug given | J9267 |
3,270 | Less often than most peers in Hematology & Oncology |
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 cancer 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 — 7 related providers in 2 groups
Class of 1982 at Hahneman Medical College of the Pacific 6
Providers who graduated from the same medical school in the same year.
Common questions
What kind of doctor is Dr. Sitarik?
Dr. Sitarik is a cancer specialist in Boulder, CO. That is the designation recorded for this NPI in the federal registry, where it is listed 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. Contact the office directly to confirm availability and scheduling.
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.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.