Mark Massak, D.O.
NPI 1952740532 · Vascular & Interventional Radiology Physician · Chambersburg, PA
Enrolled with Medicare as Practitioner - Interventional Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Massak, D.O. is a Vascular & Interventional Radiology Physician provider in Chambersburg, PA (NPI 1952740532).
Provider details
- NPI number
- 1952740532
- Entity type
- Individual
- Primary specialty
- Vascular & Interventional Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- OS020464 (PA)
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
13 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
10 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
600 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) |
|---|---|---|
| Use of a Drug to Induce Depression of Consciousness By Physician Performing a Procedure (5 Years Or Older), Initial 15 Minutes99152 | 152 | $11 |
| Ultrasonic Guidance for Blood Vessel Access76937 | 55 | $13 |
| Fluoroscopic Guidance for Insertion Or Removal of Central Vein Access Device77001 | 52 | $17 |
| Replacement of Kidney Drainage Tube Using Imaging Guidance With Review By Radiologist50435 | 48 | $109 |
| Ultrasonic Guidance for Needle Placement76942 | 36 | $29 |
| Aspiration of Fluid From Chest Cavity Using Imaging Guidance32555 | 35 | $102 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 1 distinct drug on file.
| Drug | Part D claims (2024) |
|---|---|
| Apixabanbrand: Eliquis | 12 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$4,110 across 41 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 (9)
- 1201 Letort Springs WayCarlisle, PA 17015-8011Phone: (717) 674-7600
- 112 North 7th StreetWellspan RadiologyChambersburg, PA 17201-1720Phone: (717) 262-4499
- 169 Martin AveEphrata, PA 17522-1734Phone: (717) 738-6414
- 460 N Reading RdEphrata, PA 17522-9606Phone: (717) 721-4840
- 36 Robinhood DrEtters, PA 17319-9528Phone: (717) 388-7300
- 147 Gettys StGettysburg, PA 17325-2534Phone: (717) 337-4207
- 252 S 4th StLebanon, PA 17042-6111Phone: (717) 270-7732
- 14781 Wolfe RdNew Freedom, PA 17349-9571Phone: (717) 326-1880
- 35 Monument Rd Ste 201York, PA 17403-5074Phone: (717) 812-4083
Registry dates
- Enumerated
- 2013-06-18
- Last updated
- 2026-02-02
- Certified
- 2026-02-02
Frequently asked questions
- What is Mark Massak's NPI number?
- Mark Massak's National Provider Identifier (NPI) is 1952740532, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Massak's specialty?
- Mark Massak is listed in the NPPES registry with a primary specialty of Vascular & Interventional Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Massak located?
- Mark Massak's practice location on file with NPPES is 12 St. Paul Drive, Chambersburg, PA 17201-1035.
- What is Mark Massak's phone number?
- The practice phone number listed in the NPPES registry for Mark Massak is (717) 217-6026.
- Does Mark Massak accept Medicare?
- Mark Massak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Massak's NPI active?
- Yes — Mark Massak's NPI (1952740532) is active in the NPPES registry as of the last update on 2026-02-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.