Mark Giarrizzi, PAC
NPI 1376558007 · Physician Assistant · Rock Hill, SC
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Giarrizzi, PAC is a Physician Assistant provider in Rock Hill, SC (NPI 1376558007).
Provider details
- NPI number
- 1376558007
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PAC
- Sex
- Male
- Sole proprietor
- No
- License
- 1098 (SC)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,673 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Residence Visit for Established Patient With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99349 | 889 | $101 |
| Residence Visit for Established Patient With High Level of Medical Decision Making, Per Day, If Using Time, at Least 60 Minutes99350 | 313 | $148 |
| Therapy Procedure Using Exercise to Develop Strength, Endurance, Range of Motion, and Flexibility, Each 15 Minutes97110 | 248 | $20 |
| Residence Visit for New Patient With High Level of Medical Decision Making, Per Day, If Using Time, at Least 75 Minutes99345 | 80 | $161 |
| Electrical Stimulation (unattended), to One Or More Areas for Indication(s) Other Than Wound Care, As Part of a Therapy Plan of CareG0283 | 78 | $7 |
| Physician Or Allowed Practitioner Certification for Medicare-Covered Home Health Services Under a Home Health Plan of Care (patient Not Present), Including Contacts With Home Health Agency and Review of Reports of Patient Status Required By Physicians and |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 183 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 579 | 77 |
| Atorvastatin Calcium | 573 | 91 |
| Losartan Potassium | 561 | 71 |
| Donepezil Hcl | 460 | 74 |
| Amlodipine Besylate | 436 | 71 |
| Trazodone Hcl | 423 | 70 |
| Omeprazole | 383 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-30
- Last updated
- 2007-10-26
Frequently asked questions
- What is Mark Giarrizzi's NPI number?
- Mark Giarrizzi's National Provider Identifier (NPI) is 1376558007, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Giarrizzi's specialty?
- Mark Giarrizzi is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mark Giarrizzi located?
- Mark Giarrizzi's practice location on file with NPPES is 760 Addison Ave, Rock Hill, SC 29730.
- What is Mark Giarrizzi's phone number?
- The practice phone number listed in the NPPES registry for Mark Giarrizzi is (803) 329-1930.
- Does Mark Giarrizzi accept Medicare?
- Mark Giarrizzi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Giarrizzi's NPI active?
- Yes — Mark Giarrizzi's NPI (1376558007) is active in the NPPES registry as of the last update on 2007-10-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.