DR. CLARK HARRISON MD
NPI 1679559496
Internal Medicine - Gastroenterology in Reno, NV

Q: What is Clark Harrison's NPI number?

The NPI number for Clark Harrison is 1679559496. It was assigned to this individual provider in the NPPES registry on December 22, 2005.

Q: What is Clark Harrison'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 Clark Harrison was last updated on May 7, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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 December 22, 2005PECOS EnrolledAccepts Medicare Assignment

98.86/100

CMS Quality Rating

880 RYLAND ST, RENO, NV 89502(775) 329-4600(775) 333-2969 Get Directions Write a Review

NPPES record last updated: May 7, 2010. Verified against the NPPES registry weekly; last sync: August 02, 2026.

On this page

About Dr. Clark Harrison Md NPPES

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

DR. CLARK HARRISON MD (NPI 1679559496) is an individual gastroenterology provider in Reno, Nevada, licensed in Nevada (6505) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS and is a graduate of Boston University School Of Medicine (1992).

NPPES Registry Identity

NPI1679559496

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameDR. CLARK HARRISONCredential: MD

Location Address880 RYLAND STReno, NV 89502-1603

Mailing Address880 Ryland StReno, NV 89502-1603 · (775) 329-4600 · Fax (775) 333-2969

Phone(775) 329-4600

Fax(775) 333-2969

Sole ProprietorNo

Medical School CMSBoston University School Of MedicineGraduated 1992

Enumeration DateDecember 22, 2005

Last NPPES UpdateMay 7, 2010

✔ NPI 1679559496 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 NV · 6505

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.

880 RYLAND ST, Reno, NV 89502

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Other Identifiers 3

Medicaid2016237NV

Medicare ID-Type UnspecifiedIOWCGZB05NV

Medicare UPINF34321NV

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health.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. Clark Harrison Md 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 ID4486551926

PECOS Enrollment IDI20100621000794

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 6

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.

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.

113 services112 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.

21 services21 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.

20 services20 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.

18 services18 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.

11 services11 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.

11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 89502 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

$131.25 typical visit price

range $57.07 – $173.24

Typical copayment $32.81 (range $14.26 – $43.31)

Most-billed visit code 99204

Established Patient

$100.60 typical visit price

range $18.27 – $140.96

Typical copayment $25.15 (range $4.56 – $35.24)

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.

98.86/100

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

Scored as part of a group practice

Quality

97.73

Improvement Activities

Leave this field empty

Other Providers at the Same Location NPPES 16

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

VIBEKE NUNEZ CRNA

Nurse Anesthetist, Certified Registered

880 RYLAND ST
RENO, NV 89502

Washoe County (775) 329-4600

RENO ENDOSCOPY CENTER, LLC

Clinic/Center (Ambulatory Surgical)

880 RYLAND ST
RENO, NV 89502

Washoe County (775) 329-4600

GEORGE R WINTERS III M.D.

Internal Medicine (Gastroenterology)

880 RYLAND ST
RENO, NV 89502

Washoe County (775) 329-4600

GASTROENTEROLOGY CONSULTANTS, LTD

Specialist

880 RYLAND ST
RENO, NV 89502

Washoe County (775) 329-4600

TODD MCINTOSH APRN

Nurse Practitioner (Family)

880 RYLAND ST
RENO, NV 89502

Washoe County (775) 329-4600

AMELIA MANGUNE

Nurse Practitioner (Acute Care)

880 RYLAND ST
RENO, NV 89502

Washoe County (775) 329-4600

TING-HUI HSIEH M.D.

Internal Medicine (Gastroenterology)

880 RYLAND ST
RENO, NV 89502

Washoe County (775) 329-4600

MR. RICHARD GEORGE MCCRACKEN PHYSICIAN ASSISTANT

Physician Assistant (Medical)

880 RYLAND ST
RENO, NV 89502

Washoe County (775) 329-4600

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 Clark Harrison's NPI number?

The NPI number for Clark Harrison is 1679559496. It was assigned to this individual provider in the NPPES registry on December 22, 2005.

Where is Clark Harrison located?

Clark Harrison practices at 880 Ryland St, Reno, NV 89502. The listed phone number is (775) 329-4600.

What is Clark Harrison's specialty?

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

Is Clark Harrison enrolled in Medicare?

Yes. Clark Harrison 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 Clark Harrison accept?

Health plans from Ambetter from Arizona Complete Health list Clark Harrison 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 Clark Harrison was last updated on May 7, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.