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DONALD J. HERMENS M.D.
NPI 1962475442
Internal Medicine - Gastroenterology in Quincy, IL

Active since February 07, 2006PECOS EnrolledAccepts Medicare Assignment
1025 MAINE ST, QUINCY, IL 62301(217) 222-6550 Get Directions Write a Review

NPPES record last updated: December 15, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Donald J. Hermens M.d. NPPES

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

DONALD J. HERMENS M.D. (NPI 1962475442) is an individual gastroenterology provider in Quincy, Illinois, licensed in Illinois (036101026) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS and is a graduate of Creighton University School Of Medicine (1985).

NPPES Registry Identity

NPI1962475442
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameDONALD J. HERMENSCredential: M.D.
Location Address1025 MAINE STQuincy, IL 62301-4038
Mailing Address1025 Maine StQuincy, IL 62301-4038 · (217) 222-6550
Phone(217) 222-6550
Sole ProprietorNo
Medical School CMSCreighton University School Of MedicineGraduated 1985
Enumeration DateFebruary 7, 2006
Last NPPES UpdateDecember 15, 2021
✔ NPI 1962475442 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 IL · 036101026
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.
1025 MAINE ST, Quincy, IL 62301
Open in Google Maps ↗

Other Identifiers 1

Medicaid036101026IL

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

Donald J. Hermens 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 ID8921134156
PECOS Enrollment IDI20140501001673
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 Donald Hermens reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Permanente Medical Group Inc
1,608 mi
Internal Medicine
7373 WEST LANE
Stockton, CA 95210
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1548343510 (209) 476-2000

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 62301 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
$127.46 typical visit price
range $54.80 – $168.44
Typical copayment $31.86 (range $13.70 – $42.11)
Most-billed visit code 99204
Established Patient
$97.25 typical visit price
range $17.16 – $136.56
Typical copayment $24.31 (range $4.29 – $34.14)
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.

WILLIAM J. HOLT M.D.
Orthopaedic Surgery
1025 MAINE ST
QUINCY, IL 62301
Adams County (217) 222-6550
NICOLE ANTOINETTE SHIELDS MS, LCPC, QMHP
Counselor (Professional)
1025 MAINE ST
QUINCY, IL 62301
Adams County (217) 222-6550
MRS. KRISTIN ELIZABETH-DANIEL THOMPSON DPT
Physical Therapist
1025 MAINE ST
QUINCY, IL 62301
Adams County (217) 222-6550
KATHLEEN JEAN NELSON M.S. ED.
Counselor (Professional)
1025 MAINE ST
QUINCY, IL 62301
Adams County (217) 222-6550
TAYLOR J. MOORE DO
Family Medicine
1025 MAINE ST
QUINCY, IL 62301
Adams County (217) 222-6550
ELIZABETH BAKER
Pharmacist
1025 MAINE ST
QUINCY, IL 62301
Adams County (217) 222-6550
DANA B ALTMAN DO
Family Medicine
1025 MAINE ST
QUINCY, IL 62301
Adams County (217) 222-6550
QUINCY PHYSICIANS & SURGEONS CLINIC, PLLC
Clinic/Center (End-Stage Renal Disease (ESRD) Treatment)
1025 MAINE ST
QUINCY, IL 62301
Adams County (217) 222-6550

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 Donald Hermens's NPI number?

The NPI number for Donald Hermens is 1962475442. It was assigned to this individual provider in the NPPES registry on February 7, 2006.

Where is Donald Hermens located?

Donald Hermens practices at 1025 Maine St, Quincy, IL 62301. The listed phone number is (217) 222-6550.

What is Donald Hermens's specialty?

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

Is Donald Hermens enrolled in Medicare?

Yes. Donald Hermens 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 Donald Hermens's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Donald Hermens reassigns Medicare benefits to Permanente Medical Group Inc (Stockton, CA). 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 Donald Hermens's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Donald Hermens was last updated on December 15, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.