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CATHERINE MARY GRUER MD
NPI 1245229897
Internal Medicine - Geriatric Medicine in Allentown, PA

Active since October 17, 2005PECOS Enrolled
17TH & CHEW STREET, ALLENTOWN, PA 18105(610) 969-3390(610) 969-3393 Get Directions Write a Review

NPPES record last updated: March 30, 2016. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Mar 30, 2016, Mar 22, 2016 (2 updates tracked since 2016).

About Catherine Mary Gruer Md NPPES

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

CATHERINE MARY GRUER MD (NPI 1245229897) is an individual geriatric medicine provider in Allentown, Pennsylvania, licensed in Pennsylvania (MD054780L) and active in the NPI registry since October 2005. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1245229897
Entity TypeIndividualFemale
Primary Taxonomy207RG0300X
Provider Legal NameCATHERINE MARY GRUERCredential: MD
Location Address17TH & CHEW STREETAllentown, PA 18105-7017
Mailing AddressPo Box 783311Philadelphia, PA 19178-3311 · (484) 884-4500 · Fax (484) 884-0699
Phone(610) 969-3390
Fax(610) 969-3393
Sole ProprietorNo
Enumeration DateOctober 17, 2005
Last NPPES UpdateMarch 30, 20162 updates tracked since enumeration
✔ NPI 1245229897 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Geriatric MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207RG0300X
License✔ Licensed in PA · MD054780L
Definition
An internist who has special knowledge of the aging process and special skills in the diagnostic, therapeutic, preventive and rehabilitative aspects of illness in the elderly. This specialist cares for geriatric patients in the patient's home, the office, long-term care settings such as nursing homes and the hospital.
17TH & CHEW STREET, Allentown, PA 18105
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Other Names 1

Other Name (5)Catherine Mary Glew Md

Other Identifiers 1

Medicare UPING20835

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Buckeye Health Plan, Ambetter Health, Ambetter Health of Delaware.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Catherine Mary Gruer Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Catherine Gruer reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Lehigh Valley Physician Group
Same address
Family Medicine
17TH & CHEW ST, SUITE 403
Allentown, PA 18102
  • Reassigned Medicare billing, Pennsylvania enrollment
  • 2,895 clinicians in this Medicare group
NPI 1679795165 (610) 969-3600

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 18105 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
$166.87 typical visit price
range $54.64 – $166.87
Typical copayment $41.71 (range $13.66 – $41.71)
Most-billed visit code 99205
Established Patient
$96.82 typical visit price
range $17.33 – $135.84
Typical copayment $24.20 (range $4.33 – $33.96)
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 2

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

NASRIDEEN MOHAMMED NOOR MD
Pediatrics
17TH & CHEW STREET, CHILDREN'S CLINIC
ALLENTOWN, PA 18105
Lehigh County (610) 969-4300
ELBERT TSE-FU CHEN M.D.
Obstetrics & Gynecology
17TH & CHEW STREET, OB/GYN ADMIN SUITE
ALLENTOWN, PA 18105
Lehigh County (610) 969-4515

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 Catherine Gruer's NPI number?

The NPI number for Catherine Gruer is 1245229897. It was assigned to this individual provider in the NPPES registry on October 17, 2005. The provider is also known as Catherine Mary Glew MD.

Where is Catherine Gruer located?

Catherine Gruer practices at 17th & Chew Street, Allentown, PA 18105. The listed phone number is (610) 969-3390.

What is Catherine Gruer's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Geriatric Medicine, with taxonomy code 207RG0300X.

Is Catherine Gruer enrolled in Medicare?

Yes. Catherine Gruer is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Catherine Gruer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Catherine Gruer reassigns Medicare benefits to Lehigh Valley Physician Group (Allentown, PA). 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 Catherine Gruer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Catherine Gruer accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Buckeye Health Plan list Catherine Gruer 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 Catherine Gruer was last updated on March 30, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.