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LILLIAN CLAIRE FLASHNER MD
NPI 1669058517
Internal Medicine in Philadelphia, PA

Active since March 22, 2021PECOS Enrolled
3400 SPRUCE ST, PHILADELPHIA, PA 19104(215) 662-3797 Get Directions Write a Review

NPPES record last updated: July 8, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 8, 2024, Mar 22, 2021 (2 updates tracked since 2021).

About Lillian Claire Flashner Md NPPES

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

LILLIAN CLAIRE FLASHNER MD (NPI 1669058517) is an individual internal medicine provider in Philadelphia, Pennsylvania, licensed in Pennsylvania (MD484560) and active in the NPI registry since March 2021. She is enrolled in Medicare PECOS and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1669058517
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameLILLIAN CLAIRE FLASHNERCredential: MD
Location Address3400 SPRUCE STPhiladelphia, PA 19104-4238
Mailing Address3400 Spruce St., Maloney Building, 5030Philadelphia, PA 19104 · (215) 662-3797 · Fax (215) 662-6250
Phone(215) 662-3797
Sole ProprietorNo
Enumeration DateMarch 22, 2021
Last NPPES UpdateJuly 8, 20242 updates tracked since enumeration
NPPES CertifiedJune 29, 2024
✔ NPI 1669058517 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in PA · MD484560
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
3400 SPRUCE ST, Philadelphia, PA 19104
Open in Google Maps ↗

Secondary Practice Locations 2

Location 1725 Albany StBoston, MA 02118-3549 · Phone (617) 414-5951 · Fax (617) 414-9251
Location 272 E Concord St # E124Boston, MA 02118-2642 · Phone (617) 638-8000

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Lillian Claire Flashner 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 Lillian Flashner reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

University Of Penn - Medical Group
Same address
Hospitalist
3400 SPRUCE ST
Philadelphia, PA 19104
  • Reassigned Medicare billing, Pennsylvania enrollment
  • 752 clinicians in this Medicare group
NPI 1053447151 (215) 662-4000

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

Areas of Expertise CMS Part B claims

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
27 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 19104 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
$137.17 typical visit price
range $59.88 – $180.99
Typical copayment $34.29 (range $14.97 – $45.24)
Most-billed visit code 99204
Established Patient
$105.21 typical visit price
range $19.30 – $147.29
Typical copayment $26.30 (range $4.82 – $36.82)
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.

ELIZABETH FOGLIA MD
Pediatrics
3400 SPRUCE ST, 8 RAVDIN
PHILADELPHIA, PA 19104
Philadelphia County (215) 662-3228
JOEL M STEIN MD
Radiology (Diagnostic Radiology)
3400 SPRUCE ST
PHILADELPHIA, PA 19104
Philadelphia County (215) 662-3005
PRISCILLA NELSON M.D.
Anesthesiology
3400 SPRUCE ST, 6 DULLES
PHILADELPHIA, PA 19104
Philadelphia County (215) 349-8310
DR. JASON THOMAS ACKRIVO MD
Internal Medicine (Pulmonary Disease)
3400 SPRUCE ST
PHILADELPHIA, PA 19104
Philadelphia County (215) 614-0871
JEAN-PHILIPPE RICHARD DMD
Student in an Organized Health Care Education/Training Program
3400 SPRUCE ST
PHILADELPHIA, PA 19104
Philadelphia County (215) 662-6176
LEAH M LOPEZ PA-C
Physician Assistant (Medical)
3400 SPRUCE ST, 4 SILVERSTEIN
PHILADELPHIA, PA 19104
Philadelphia County (215) 662-7870
JOANIE M GARRATT MD
Radiology (Diagnostic Radiology)
3400 SPRUCE ST
PHILADELPHIA, PA 19104
Philadelphia County (215) 662-3000
JENNIFER DEKERLEGAND
Physical Therapist
3400 SPRUCE ST, 1 WHITE BUILDING
PHILADELPHIA, PA 19104
Philadelphia County (215) 662-3265

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 Lillian Flashner's NPI number?

The NPI number for Lillian Flashner is 1669058517. It was assigned to this individual provider in the NPPES registry on March 22, 2021.

Where is Lillian Flashner located?

Lillian Flashner practices at 3400 Spruce St, Philadelphia, PA 19104. The listed phone number is (215) 662-3797.

What is Lillian Flashner's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Lillian Flashner enrolled in Medicare?

Yes. Lillian Flashner is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Lillian Flashner's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Lillian Flashner reassigns Medicare benefits to University Of Penn - Medical Group (Philadelphia, 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 Lillian Flashner'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 Lillian Flashner was last updated on July 8, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.