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GUNTER KLAUS RIEG M.D.
NPI 1528096138
Internal Medicine - Infectious Disease in Long Beach, CA

Active since June 30, 2006PECOS EnrolledAccepts Medicare Assignment
1333 CHESTNUT AVE, LONG BEACH, CA 90813(562) 599-8601(562) 218-0853 Get Directions Write a Review

NPPES record last updated: December 6, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Gunter Klaus Rieg M.d. NPPES

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

GUNTER KLAUS RIEG M.D. (NPI 1528096138) is an individual infectious disease provider in Long Beach, California, licensed in California (I04192) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1993).

NPPES Registry Identity

NPI1528096138
Entity TypeIndividualMale
Primary Taxonomy207RI0200X
Provider Legal NameGUNTER KLAUS RIEGCredential: M.D.
Location Address1333 CHESTNUT AVELong Beach, CA 90813-2944
Mailing Address1000 W Carson St, N-25; #471Torrance, CA 90502-2004 · (310) 222-3382 · Fax (310) 222-2882
Phone(562) 599-8601
Fax(562) 218-0853
Sole ProprietorNo
Medical School CMSOtherGraduated 1993
Enumeration DateJune 30, 2006
Last NPPES UpdateDecember 6, 2021
✔ NPI 1528096138 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RI0200X
License✔ Licensed in CA · I04192
Definition
An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.
1333 CHESTNUT AVE, Long Beach, CA 90813
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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

Gunter Klaus Rieg 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 ID9739161118
PECOS Enrollment IDI20040601001427
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 Reassignments

2

Medicare enrollment records show Gunter Rieg reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

County Of Los Angeles
Same address
Clinic/Center
1333 CHESTNUT AVE
Long Beach, CA 90813
  • Reassigned Medicare billing, California enrollment
  • 1,939 clinicians in this Medicare group
NPI 1568483766 (562) 599-8709
Southern California Permanente Medical Group
5.7 mi
Health Maintenance Organization
25825 VERMONT AVE
Harbor City, CA 90710
  • Reassigned Medicare billing, California enrollment
  • 13,921 clinicians in this Medicare group
NPI 1598797011 (310) 325-5111

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 90813 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
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
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.

MAYRA P MONTOYA MANRIQUEZ LVN
Registered Nurse (Ambulatory Care)
1333 CHESTNUT AVE
LONG BEACH, CA 90813
Los Angeles County (323) 753-2300
KATYA C CORADO M.D.
Internal Medicine
1333 CHESTNUT AVE
LONG BEACH, CA 90813
Los Angeles County (562) 599-8601
SHANA JORDAN M.D.
Family Medicine
1333 CHESTNUT AVE
LONG BEACH, CA 90813
Los Angeles County (562) 599-8601
MS. PATRICIA SERNA L.C.S.W.
Social Worker (Clinical)
1333 CHESTNUT AVE
LONG BEACH, CA 90813
Los Angeles County (562) 599-8674
JEFFREY BARBOSA M.D.
Family Medicine
1333 CHESTNUT AVE
LONG BEACH, CA 90813
Los Angeles County (562) 599-8601
SUN HWE UM N.P.
Nurse Practitioner
1333 CHESTNUT AVE
LONG BEACH, CA 90813
Los Angeles County (562) 599-8601
BONNIE BAYYA FNP-BC
Nurse Practitioner
1333 CHESTNUT AVE
LONG BEACH, CA 90813
Los Angeles County (310) 753-2300
COUNTY OF LOS ANGELES AUDITOR CONTROLLER
Clinic/Center
1333 CHESTNUT AVE
LONG BEACH, CA 90813
Los Angeles County (562) 599-8709

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 Gunter Rieg's NPI number?

The NPI number for Gunter Rieg is 1528096138. It was assigned to this individual provider in the NPPES registry on June 30, 2006.

Where is Gunter Rieg located?

Gunter Rieg practices at 1333 Chestnut Ave, Long Beach, CA 90813. The listed phone number is (562) 599-8601.

What is Gunter Rieg's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Is Gunter Rieg enrolled in Medicare?

Yes. Gunter Rieg 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 organizations bill Medicare for Gunter Rieg's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gunter Rieg reassigns Medicare benefits to 2 organizations: County Of Los Angeles (Long Beach, CA) and Southern California Permanente Medical Group (Harbor City, CA). Each 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 Gunter Rieg'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 Gunter Rieg was last updated on December 6, 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.