Mark Postacchini, MD
NPI 1255620019 · Hospitalist Physician · Mesa, AZ
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Postacchini, MD is a Hospitalist Physician provider in Mesa, AZ (NPI 1255620019).
Provider details
- NPI number
- 1255620019
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 125060059 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
15 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
548 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 415 | $76 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 63 | $112 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 44 | $128 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 26 | $78 |
Typical Medicare-allowed amounts for these services range $76–$128 (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 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Oxycodone Hcl | 34 | 34 |
| Pantoprazole Sodium | 24 | 23 |
| Furosemide | 21 | 21 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 18 | 18 |
| Apixabanbrand: Eliquis | 17 | 17 |
| Prednisone | 16 | 16 |
| Metoprolol Tartrate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-04-01
- Last updated
- 2016-03-09
Frequently asked questions
- What is Mark Postacchini's NPI number?
- Mark Postacchini's National Provider Identifier (NPI) is 1255620019, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Postacchini's specialty?
- Mark Postacchini is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Postacchini located?
- Mark Postacchini's practice location on file with NPPES is 6644 E Baywood Ave, Mesa, AZ 85206.
- What is Mark Postacchini's phone number?
- The practice phone number listed in the NPPES registry for Mark Postacchini is (480) 321-3900.
- Does Mark Postacchini accept Medicare?
- Mark Postacchini is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Postacchini's NPI active?
- Yes — Mark Postacchini's NPI (1255620019) is active in the NPPES registry as of the last update on 2016-03-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.