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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. FREDERICK A KLEIN M.D.
NPI 1962487876
Internal Medicine - Gastroenterology in Tucson, AZ

Active since December 13, 2005PECOS Enrolled
26.06/100
CMS Quality Rating
7566 N LA CHOLLA BLVD, STE A, TUCSON, AZ 85741(520) 742-4139(520) 742-9618 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. Frederick A Klein M.d. NPPES

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

DR. FREDERICK A KLEIN M.D. (NPI 1962487876) is an individual gastroenterology provider in Tucson, Arizona, licensed in Arizona (11761) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS and is a graduate of Northwestern University Feinberg Medical School (1980).

NPPES Registry Identity

NPI1962487876
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameDR. FREDERICK A KLEINCredential: M.D.
Location Address7566 N LA CHOLLA BLVD, STE ATucson, AZ 85741-2307
Mailing Address7566 N La Cholla Blvd, Ste ATucson, AZ 85741-2307 · (520) 742-4139 · Fax (520) 742-9618
Phone(520) 742-4139
Fax(520) 742-9618
Sole ProprietorNo
Medical School CMSNorthwestern University Feinberg Medical SchoolGraduated 1980
Enumeration DateDecember 13, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1962487876 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 · 11761
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.
7566 N LA CHOLLA BLVD, Tucson, AZ 85741
Open in Google Maps ↗

Other Identifiers 5

OtherAZ0025410AZ · Blue Cross Blue Shield
OtherXPY035840AZ · Medi-cal
Medicaid223587AZ
Other1Z0219AZ · Healthnet
Other696649AZ · Aetna

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.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. Frederick A Klein 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 ID6406832146
PECOS Enrollment IDI20110203001124
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 7

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 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.
481 services297 patients
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.
89 services79 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.
81 services81 patients
Measurement of hydrogen in breath to test for stomach and bowel symptoms 91065
This test involves breathing into a bag to measure hydrogen levels in your breath. High levels can indicate issues with food digestion or absorption in your stomach or intestines. It's non-invasive, painless, and helps diagnose certain gastrointestinal conditions.
65 services41 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.
41 services41 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.
15 services15 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85741 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.

26.06/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Individually scored
Quality0
Improvement Activities0
Cost86.88

Other Providers at the Same Location NPPES 11

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

MS. ANNE M ELLIOTT PA
Physician Assistant
7566 N LA CHOLLA BLVD, SUITE A
TUCSON, AZ 85741
Pima County (520) 742-4139
ARIZONA GASTROENTEROLOGY LTD
Internal Medicine (Gastroenterology)
7566 N LA CHOLLA BLVD, STE A
TUCSON, AZ 85741
Pima County (520) 742-4139
KYLEIGH STAPLES FNP-C
Nurse Practitioner (Family)
7566 N LA CHOLLA BLVD
TUCSON, AZ 85741
Pima County (520) 742-4139
DR. BRYAN CONTRERAS M.D.
Internal Medicine (Gastroenterology)
7566 N LA CHOLLA BLVD, STE A
TUCSON, AZ 85741
Pima County (520) 742-4139
DR. SCOTT EDWARD BLINKOFF M.D.
Internal Medicine (Gastroenterology)
7566 N LA CHOLLA BLVD, STE A
TUCSON, AZ 85741
Pima County (520) 742-4139
HI FLOW ANESTHESIA LLC
Nurse Anesthetist, Certified Registered
7566 N LA CHOLLA BLVD
TUCSON, AZ 85741
Pima County (520) 742-4139
DR. JAMES PATRICK DINNING M.D.
Internal Medicine (Gastroenterology)
7566 N LA CHOLLA BLVD, STE A
TUCSON, AZ 85741
Pima County (520) 742-4139
KATHLEEN A. PIOTROWSKI APRN-CRNA
Nurse Anesthetist, Certified Registered
7566 N LA CHOLLA BLVD
TUCSON, AZ 85741
Pima County (520) 547-5847

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 Frederick Klein's NPI number?

The NPI number for Frederick Klein is 1962487876. It was assigned to this individual provider in the NPPES registry on December 13, 2005.

Where is Frederick Klein located?

Frederick Klein practices at 7566 N La Cholla Blvd Ste A, Tucson, AZ 85741. The listed phone number is (520) 742-4139.

What is Frederick Klein's specialty?

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

Is Frederick Klein enrolled in Medicare?

Yes. Frederick Klein 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 Frederick Klein accept?

Health plans from Ambetter from Arizona Complete Health and Blue Cross Blue Shield of Arizona list Frederick Klein 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 Frederick Klein was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 34 days 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.