NPPES file of Aug 9, 2026

Jonathan Spencer Mellen, M.D.

Gastroenterology Physician · Phoenix, AZ

Jonathan Spencer Mellen, M.D. is a gastroenterology physician with a practice address in Phoenix, Arizona, and NPI 1609919471, issued on Feb 14, 2007. Check the license (Arizona 44619, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1609919471
Name
Jonathan Spencer Mellen
Credential
M.D.
Primary taxonomy
Gastroenterology Physician 207RG0100X
License numbers
44619 AZ
210986 AK
Self-reported in NPPES; status is on the state search
Practice location
9305 W Thomas RD, Phoenix, AZ 85037
Phone
(623) 236-8507
Enumerated
Feb 14, 2007
Record last updated
Jun 11, 2026
Fax
(623) 236-8508
Medicare enrollment
Enrolled (PECOS I20110930000518); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest gastroenterology physician records → All 403 in Arizona → Look up another NPI →

Also registered at 9305 W Thomas RD

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Ricardo Borsatto, M.D.Gastroenterology Physician1669679171
  2. Felix Carrillo, PT, DPTPhysical Therapist1124325477
  3. Krishdeep Chadha, MDGastroenterology Physician1619147915
  4. Madeline ChelkoWomen's Health Nurse Practitioner1932710217
  5. Monica Choi, MSN, APRN, FNP-BCFamily Nurse Practitioner1215870761
  6. Cari Cowling, MDObstetrics & Gynecology Physician1396948634

Verify Jonathan Spencer Mellen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersArizona Medical Board
    Search for license 44619    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Arizona license search

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11% fewer Medicare Part D claims than the average gastroenterology physician in 2024

718 Medicare Part D claims for 298 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 28% of claims.

  1. Jonathan Mellen718
  2. Specialty average811

Most prescribed

  1. Gavilyte-G90 claims
  2. Linzess74 claims
  3. Pantoprazole Sodium73 claims
  4. Dexlansoprazole Dr52 claims
  5. Omeprazole47 claims
  6. Sod Sulf-Potass Sulf-Mag Sulf43 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.

Industry payments in 2024: $476.42

21 payments; by number, the most common kind was food and beverage; the largest payer was Salix Pharmaceuticals, a division of Bausch Health US, LLC. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Jonathan Mellen$476.42
  2. Specialty average$5,015.95

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

2 hospitals and group practices

  1. Yuma Regional Medical CenterYuma, AZ · Acute Care Hospitals2 of 5 stars
  2. Alaska GI Associates LLCWasilla, AK

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

Jonathan Spencer Mellen among 403 gastroenterology physician records in Arizona

Jonathan Spencer Mellen, M.D. is one of 403 gastroenterology physician records with a practice address in Arizona. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 59% of them.

  • NPI issued2007 · 59% of these records are older, 31% newer
  • In a Medicare fileYes · 84% of these records are
  • In the CMS Doctors and Clinicians fileYes · 73% of these records are
  • Graduated2004 · median 2001 among the 295 with a school on file
  • Record last updated2026 · 47% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Gastroenterology Physician providers in Arizona

There are 403 gastroenterology physician records in Arizona.

All 403 in Arizona → Every provider in Phoenix → Gastroenterology Physician nationwide →

The 8 gastroenterology physician records with the nearest ZIP codes

  1. Ricardo Borsatto, M.D.Phoenix, AZ 850371669679171
  2. Krishdeep Chadha, MDPhoenix, AZ 850371619147915
  3. Rukiya Chavers, FNP CPhoenix, AZ 850371043313646
  4. Gerald IrwinPhoenix, AZ 850371184561458
  5. Mansur Khan, MDPhoenix, AZ 850371770532020
  6. Kandarp Patel, DOPhoenix, AZ 850371801086087
  7. Neil Shernoff, M.D.Phoenix, AZ 850371578543336
  8. Amy Soloman, DOPhoenix, AZ 850371982723508

Common questions

What is Jonathan Spencer Mellen, M.D.'s NPI number?

Jonathan Spencer Mellen, M.D.'s National Provider Identifier (NPI) is 1609919471, issued on Feb 14, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Jonathan Spencer Mellen, M.D. located?

The NPPES record lists a practice address at 9305 W Thomas RD, Phoenix, AZ, 85037. Phone: (623) 236-8507. Providers update this record themselves, so call before visiting.

How can I verify Jonathan Spencer Mellen, M.D.'s license?

NPPES lists Arizona license number 44619, 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 Jonathan Spencer Mellen, M.D. prescribe under Medicare Part D?

In 2024, Jonathan Spencer Mellen, M.D. had 718 Medicare Part D claims for 298 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.

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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.