Mark Paul Postacchini, MD
Hospitalist Physician · Mesa, AZ
Mark Paul Postacchini, MD is a hospitalist physician with a practice address in Mesa, Arizona, and NPI 1255620019, issued on Apr 1, 2011. Check the license (Arizona 51279, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mark Paul Postacchini
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License numbers
- 51279 AZ
125060059 IL
Q0343 TX
Self-reported in NPPES; status is on the state search - Practice location
- 6644 E Baywood Ave, Mesa, AZ 85206
- Phone
- (480) 321-3900
- Enumerated
- Apr 1, 2011
- Record last updated
- Mar 9, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (480) 321-3840
- Medicare enrollment
- Enrolled (PECOS I20160129000989); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 775 in Arizona → Look up another NPI →
Also registered at 6644 E Baywood Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Hassan Abbas, D.O.Internal Medicine Physician1477294775
- Jose Acosta, RPARadiology Practitioner Assistant1376721076
- Melissa Albers, CRNACertified Registered Nurse Anesthetist1386183481
- Maria Alexov, M.D.Infectious Disease Physician1952361271
- Ayman Alhadheri, MDEmergency Medicine Physician1184205403
Verify Mark Paul Postacchini in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 51279Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
21% fewer Medicare Part D claims than the average hospitalist physician in 2024
411 Medicare Part D claims for 183 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 49 claims were for opioids.
Most prescribed
- Oxycodone Hcl34 claims
- Pantoprazole Sodium24 claims
- Furosemide21 claims
- Amoxicillin-Clavulanate Potass18 claims
- Eliquis17 claims
- Prednisone16 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 92.3 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- Banner - University Hospital Based Physicians LLCPhoenix, AZ
- Banner Hospital Based Physicians Arizona LLCMesa, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Paul Postacchini among 775 hospitalist physician records in Arizona
Mark Paul Postacchini, MD is one of 775 hospitalist physician records with a practice address in Arizona. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 42% of them.
- NPI issued2011 · 42% of these records are older, 53% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 80% of these records are
- Graduated2010 · median 2011 among the 618 with a school on file
- Record last updated2016 · 43% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in Arizona
There are 775 hospitalist physician records in Arizona.
All 775 in Arizona → Every provider in Mesa → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Kenny Chuu, MDMesa, AZ 852061619104254
- Ini Ekpo, MDMesa, AZ 852061720004138
- Rakesh Gaddam, M.D.Mesa, AZ 852061306100375
- Ria Ghose Kundu, M.D.Mesa, AZ 852061881037539
- Ritesh Kanotra, MDMesa, AZ 852061215287685
- Pavan Lankaala, MDMesa, AZ 852061386990877
- Shahnaz Mazdeh, MDMesa, AZ 852061912128364
- Sandeep Nagre, MDMesa, AZ 852061871840108
Common questions
What is Mark Paul Postacchini, MD's NPI number?
Mark Paul Postacchini, MD's National Provider Identifier (NPI) is 1255620019, issued on Apr 1, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Mark Paul Postacchini, MD located?
The NPPES record lists a practice address at 6644 E Baywood Ave, Mesa, AZ, 85206. Phone: (480) 321-3900. Providers update this record themselves, so call before visiting.
How can I verify Mark Paul Postacchini, MD's license?
NPPES lists Arizona license number 51279, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark Paul Postacchini, MD prescribe under Medicare Part D?
In 2024, Mark Paul Postacchini, MD had 411 Medicare Part D claims for 183 beneficiaries; the average among hospitalist physician prescribers was 521. Part D covers Medicare prescriptions only.
What is Mark Paul Postacchini, MD's MIPS final score?
The 2023 MIPS final score is 92.3 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.