DR. JONATHAN SPENCER MELLEN M.D.
NPI 1609919471
Internal Medicine - Gastroenterology in Phoenix, AZ

Q: What is Jonathan Mellen's NPI number?

The NPI number for Jonathan Mellen is 1609919471. It was assigned to this individual provider in the NPPES registry on February 14, 2007.

Q: What is Jonathan Mellen's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Q: When was this NPI record last updated?

The NPPES record for Jonathan Mellen was last updated on June 11, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since February 14, 2007PECOS EnrolledAccepts Medicare Assignment

9305 W THOMAS RD, STE 478, PHOENIX, AZ 85037(623) 236-8507(623) 236-8508 Get Directions Write a Review

NPPES record last updated: June 11, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jan 2, 2025, Nov 1, 2016, Nov 30, 2015 (3 updates tracked since 2015).

On this page

About Dr. Jonathan Spencer Mellen M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. JONATHAN SPENCER MELLEN M.D. (NPI 1609919471) is an individual gastroenterology provider in Phoenix, Arizona, licensed in Arizona (44619) and active in the NPI registry since February 2007. He is enrolled in Medicare PECOS, maintains 3 additional practice locations, and is a graduate of Other (2004).

NPPES Registry Identity

NPI1609919471

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameDR. JONATHAN SPENCER MELLENCredential: M.D.

Location Address9305 W THOMAS RD, STE 478Phoenix, AZ 85037-3375

Mailing Address9305 W Thomas Rd, Ste 478Phoenix, AZ 85037-3375 · (623) 236-8507 · Fax (623) 236-8508

Phone(623) 236-8507

Fax(623) 236-8508

Sole ProprietorNo

Medical School CMSOtherGraduated 2004

Enumeration DateFebruary 14, 2007

Last NPPES UpdateJune 11, 20263 updates tracked since enumeration

NPPES CertifiedJune 11, 2026

✔ NPI 1609919471 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

Licenses✔ Licensed in AZ · 44619✔ Licensed in AK · 210986

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

9305 W THOMAS RD, Phoenix, AZ 85037

Open in Google Maps ↗

Secondary Practice Locations 3

Location 12490 S Woodworth Loop Ste 200Palmer, AK 99645-7410 · Phone (907) 861-6315 · Fax (907) 861-6533

Location 21200 N Beaver StFlagstaff, AZ 86001-3118 · Phone (928) 773-2332

Location 32400 S Avenue AYuma, AZ 85364-7170 · Phone (928) 336-3213

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Antidote Health Plan of Arizona, Inc., Blue Cross Blue Shield of Arizona and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Jonathan Spencer Mellen M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3375715014

PECOS Enrollment IDI20110930000518, I20231212003467

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 13

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239

This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.

113 services113 patients

Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385

This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.

105 services103 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

73 services59 patients

Biopsy of large bowel using a flexible endoscope 45380

A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.

67 services67 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

41 services41 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

34 services34 patients

Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43235

This procedure, known as an upper endoscopy, involves inserting a thin, flexible tube with a camera down the throat to examine the esophagus, stomach, and upper small bowel. It helps diagnose conditions like ulcers or inflammation.

31 services29 patients

Diagnostic exam of large bowel using a flexible endoscope 45378

This procedure, known as a colonoscopy, involves using a flexible tube with a light and camera to examine the large intestine. It helps detect any abnormalities such as polyps or inflammation. It's a standard procedure to ensure gut health.

31 services29 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

20 services20 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

15 services14 patients

Insertion of guide wire with dilation of esophagus using a flexible endoscope 43248

This is a procedure where a thin tube, called an endoscope, is gently passed through your mouth into your esophagus. A guide wire is then inserted to help widen any narrow areas. This helps improve swallowing and reduce discomfort.

14 services14 patients

Colorectal cancer screening; colonoscopy on individual at high risk G0105

Colorectal cancer screening, specifically a colonoscopy, is a preventive measure for those at high risk. A thin, flexible tube with a camera inspects the colon to spot any abnormal growths. This test helps detect potential issues early, enhancing the effectiveness of treatment.

14 services14 patients

Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk G0121

Colorectal cancer screening, such as a colonoscopy, is a preventive measure to detect early signs of cancer in the large intestine. For individuals not at high risk, it's typically recommended at age 50. A small, flexible tube with a camera is used to examine your colon. It's a safe, effective way to catch issues early.

13 services13 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85037 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$127.71 typical visit price

range $55.44 – $168.60

Typical copayment $31.92 (range $13.86 – $42.15)

Most-billed visit code 99204

Established Patient

$98.00 typical visit price

range $17.72 – $137.41

Typical copayment $24.50 (range $4.43 – $34.35)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. DIMPY KAPOOR M.D.

Internal Medicine (Rheumatology)

9305 W THOMAS RD, STE 455
PHOENIX, AZ 85037

Maricopa County (623) 399-9010

ARETE SLEEP THERAPY LLC

Durable Medical Equipment & Medical Supplies

9305 W THOMAS RD, SUITE 465
PHOENIX, AZ 85037

Maricopa County (866) 396-2287

LEGESSE MEKONNEN MD

Internal Medicine (Infectious Disease)

9305 W THOMAS RD, SUITE 380
PHOENIX, AZ 85037

Maricopa County (623) 327-4144

GOVINDA CHANDRA SATAPATHY MD

Internal Medicine

9305 W THOMAS RD, #285
PHOENIX, AZ 85037

Maricopa County (623) 849-1988

MS. JANICE LEE CROLL OTR

Occupational Therapist

9305 W THOMAS RD, SUITE 150
PHOENIX, AZ 85037

Maricopa County (623) 889-0411

GASTROINTESTINAL & LIVER DISEASE CENTER PLLC

Internal Medicine (Gastroenterology)

9305 W THOMAS RD, SUITE #255
PHOENIX, AZ 85037

Maricopa County (480) 734-8737

FELIX B CARRILLO PT, DPT

Physical Therapist

9305 W THOMAS RD, SUITE 150
PHOENIX, AZ 85037

Maricopa County (623) 889-0411

WENDI MORFITT MD PLLC

Pediatrics

9305 W THOMAS RD, SUITE 450
PHOENIX, AZ 85037

Maricopa County (623) 889-3303

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Jonathan Mellen's NPI number?

The NPI number for Jonathan Mellen is 1609919471. It was assigned to this individual provider in the NPPES registry on February 14, 2007.

Where is Jonathan Mellen located?

Jonathan Mellen practices at 9305 W Thomas Rd Ste 478, Phoenix, AZ 85037. The listed phone number is (623) 236-8507.

What is Jonathan Mellen's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Jonathan Mellen enrolled in Medicare?

Yes. Jonathan Mellen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Jonathan Mellen accept?

Health plans from Ambetter from Arizona Complete Health, Antidote Health Plan of Arizona, Inc., Blue Cross Blue Shield of Arizona, Moda Health Plan, Inc. and Oscar Health Plan, Inc. and 2 other insurers list Jonathan Mellen as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Jonathan Mellen was last updated on June 11, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.