DR. BARBARA J MACCOLLUM M.D.
NPI 1215925821
Internal Medicine - Gastroenterology in Phoenix, AZ

Q: What is Barbara Maccollum's NPI number?

The NPI number for Barbara Maccollum is 1215925821. It was assigned to this individual provider in the NPPES registry on October 7, 2005. The provider is also known as Barbara J Miller M.D..

Q: What is Barbara Maccollum'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 Barbara Maccollum was last updated on February 17, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 years 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 October 07, 2005PECOS EnrolledAccepts Medicare Assignment

75/100

CMS Quality Rating

1300 N 12TH ST, SUITE 613, PHOENIX, AZ 85006(602) 254-5321(602) 254-6582 Get Directions Write a Review

NPPES record last updated: February 17, 2017. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Dr. Barbara J Maccollum M.d. NPPES

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

DR. BARBARA J MACCOLLUM M.D. (NPI 1215925821) is an individual gastroenterology provider in Phoenix, Arizona, licensed in Arizona (15579) and active in the NPI registry since October 2005. She is enrolled in Medicare PECOS and is a graduate of University Of Arizona College Of Medicine (1984).

NPPES Registry Identity

NPI1215925821

Entity TypeIndividualFemale

Primary Taxonomy207RG0100X

Provider Legal NameDR. BARBARA J MACCOLLUMCredential: M.D.

Location Address1300 N 12TH ST, SUITE 613Phoenix, AZ 85006-2848

Mailing Address3020 E Camelback Rd, Suite 301Phoenix, AZ 85016-5059 · (602) 264-9100 · Fax (602) 264-9101

Phone(602) 254-5321

Fax(602) 254-6582

Sole ProprietorNo

Medical School CMSUniversity Of Arizona College Of MedicineGraduated 1984

Enumeration DateOctober 7, 2005

Last NPPES UpdateFebruary 17, 2017

✔ NPI 1215925821 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in AZ · 15579

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.

1300 N 12TH ST, Phoenix, AZ 85006

Open in Google Maps ↗

Other Names 1

Former Name (1)Barbara J Miller M.d.

Other Identifiers 6

Medicare ID-Type Unspecified10WCHWR03

Medicare UPINC99914

Other120390AZ · Medicare Group Number

Other317047AZ · Medicaid Group Number

Medicaid260240AZ

Medicare PIN120429AZ

Accepted Insurance

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

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Barbara J Maccollum 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 ID345263463

PECOS Enrollment IDI20060104000423

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.

Medicare Billing Reassignment

Medicare enrollment records show Barbara Maccollum reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Arizona Digestive Health, PC

8.6 mi

Gastroenterology

3260 N HAYDEN RD STE 112
Scottsdale, AZ 85251

Reassigned Medicare billing, Arizona enrollment
143 clinicians in this Medicare group

NPI 1992981583 (602) 264-9100

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 11

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.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

179 services153 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.

138 services134 patients

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.

116 services110 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.

107 services107 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.

95 services87 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.

86 services86 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.

71 services71 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.

44 services44 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.

34 services34 patients

Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm 43249

This procedure involves using a flexible tube with a camera, called an endoscope, to gently expand narrowed areas in your esophagus, stomach, or upper small bowel. A small balloon is inflated, making it easier for food and liquid to pass through. It's safe and effective.

22 services21 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.

16 services16 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85006 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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

75/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

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. DIANA LYNELLE DABELL M.D.

Emergency Medicine

1300 N 12TH ST, STE 301
PHOENIX, AZ 85006

Maricopa County (602) 839-6968

PINNACLE COLON AND RECTAL SURGEONS, PLLC

Specialist

1300 N 12TH ST, SUITE 619
PHOENIX, AZ 85006

Maricopa County (602) 714-5482

INTERNISTS, ONCOLOGISTS LTD

Internal Medicine (Hematology & Oncology)

1300 N 12TH ST, SUITE 612
PHOENIX, AZ 85006

Maricopa County (602) 258-4875

PHILIP KACZAR MD PC

Internal Medicine

1300 N 12TH ST, SUITE #516
PHOENIX, AZ 85006

Maricopa County (602) 252-3967

BARBARA J RUNQUIST NP

Nurse Practitioner

1300 N 12TH ST, SUITE 404
PHOENIX, AZ 85006

Maricopa County (602) 839-0265

DR. ROBERT DEAN RIERSON MD

Obstetrics & Gynecology

1300 N 12TH ST, SUITE 501
PHOENIX, AZ 85006

Maricopa County (602) 839-4915

MISS FARRAH L BLACK PA

Physician Assistant (Medical)

1300 N 12TH ST, STE 500
PHOENIX, AZ 85006

Maricopa County (602) 839-2606

VIKTORIA KRAJNC MD

Family Medicine

1300 N 12TH ST, SUITE 605
PHOENIX, AZ 85006

Maricopa County (602) 839-5271

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 Barbara Maccollum's NPI number?

The NPI number for Barbara Maccollum is 1215925821. It was assigned to this individual provider in the NPPES registry on October 7, 2005. The provider is also known as Barbara J Miller M.D..

Where is Barbara Maccollum located?

Barbara Maccollum practices at 1300 N 12th St Suite 613, Phoenix, AZ 85006. The listed phone number is (602) 254-5321.

What is Barbara Maccollum's specialty?

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

Is Barbara Maccollum enrolled in Medicare?

Yes. Barbara Maccollum 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.

Which organization bills Medicare for Barbara Maccollum's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Barbara Maccollum reassigns Medicare benefits to Arizona Digestive Health, PC (Scottsdale, AZ). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Barbara Maccollum's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Barbara Maccollum accept?

Health plans from Ambetter from Arizona Complete Health, Blue Cross Blue Shield of Arizona, Cigna HealthCare of Arizona, Inc and UnitedHealthcare list Barbara Maccollum 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 Barbara Maccollum was last updated on February 17, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 years 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.