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MARISSA NAOMI KARPOFF M.D.
NPI 1659613347
Internal Medicine - Rheumatology in Wynnewood, PA

Active since March 20, 2013PECOS EnrolledAccepts Medicare Assignment
81.71/100
CMS Quality Rating
100 E LANCASTER AVE STE 137, WYNNEWOOD, PA 19096(610) 896-8400(610) 896-9652 Get Directions Write a Review

NPPES record last updated: April 15, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Apr 15, 2026, Mar 25, 2026, Jul 25, 2019 (3 updates tracked since 2019).

About Marissa Naomi Karpoff M.d. NPPES

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

MARISSA NAOMI KARPOFF M.D. (NPI 1659613347) is an individual rheumatology provider in Wynnewood, Pennsylvania, licensed in Pennsylvania (MD464904) and active in the NPI registry since March 2013. She is enrolled in Medicare PECOS, is affiliated with Cooper University Hospital, and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1659613347
Entity TypeIndividualFemale
Primary Taxonomy207RR0500X
Provider Legal NameMARISSA NAOMI KARPOFFCredential: M.D.
Location Address100 E LANCASTER AVE STE 137Wynnewood, PA 19096-3453
Mailing Address1 Federal St # 200Camden, NJ 08103-1088 · (856) 356-4924
Phone(610) 896-8400
Fax(610) 896-9652
Sole ProprietorNo
Medical School CMSTulane University School Of MedicineGraduated 2013
Enumeration DateMarch 20, 2013
Last NPPES UpdateApril 15, 20263 updates tracked since enumeration
NPPES CertifiedApril 15, 2026
✔ NPI 1659613347 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · RheumatologyAllopathic & Osteopathic Physicians
Taxonomy Code207RR0500X
Licenses✔ Licensed in PA · MD464904✔ Licensed in NJ · 25MA10574700
Definition
An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and collagen diseases.
Also ListedInternal MedicineTaxonomy 207R00000X · License 277829 (NY)
100 E LANCASTER AVE STE 137, Wynnewood, PA 19096
Open in Google Maps ↗

Secondary Practice Locations 3

Location 11275 York AveNew York, NY 10065-6007 · Phone (212) 639-2734
Location 21935 Route 70 E Fl 2Cherry Hill, NJ 08003 · Phone (856) 428-7700
Location 3825 Old Lancaster Rd Ste 320Bryn Mawr, PA 19010-3235 · Phone (610) 527-3800

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

Marissa Naomi Karpoff 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 ID9638465537
PECOS Enrollment IDI20190826003352, I20260217001355
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 6

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.
205 services127 patients
Injection, triamcinolone acetonide, not otherwise specified, 10 mg J3301
Triamcinolone acetonide is a medication used to reduce inflammation in the body. It's given as a 10 mg injection for conditions like allergies, arthritis, or skin problems. The injection helps to decrease swelling, redness, and itching.
116 services23 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.
67 services67 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.
22 services21 patients
Aspiration and/or injection of fluid from large joint 20610
This procedure involves using a needle to remove (aspiration) or introduce (injection) fluid into a large joint like the knee or hip. It can help diagnose conditions, relieve discomfort, or deliver medication directly to the joint.
15 services13 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
12 services12 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Cooper University Hospital

Acute Care Hospitals · Camden, NJ
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number310014
Location1 Cooper PlazaCamden, NJ 08103 · Camden County
Emergency services Birthing friendly

Main Line Hospital Lankenau

Acute Care Hospitals · Wynnewood, PA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number390195
Location100 Lancaster AveWynnewood, PA 19096 · Montgomery County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 19096 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.

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.

81.71/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality73.07
Promoting Interoperability100
Improvement Activities40
Cost55.39

Other Providers at the Same Location NPPES

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

DR. TANYA CHRISTINE HARARI DO
Internal Medicine (Rheumatology)
100 E LANCASTER AVE STE 137
WYNNEWOOD, PA 19096
Montgomery County (610) 896-8400

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 Marissa Karpoff's NPI number?

The NPI number for Marissa Karpoff is 1659613347. It was assigned to this individual provider in the NPPES registry on March 20, 2013.

Where is Marissa Karpoff located?

Marissa Karpoff practices at 100 E Lancaster Ave Ste 137, Wynnewood, PA 19096. The listed phone number is (610) 896-8400.

What is Marissa Karpoff's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.

Is Marissa Karpoff enrolled in Medicare?

Yes. Marissa Karpoff 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.

Is Marissa Karpoff affiliated with any hospitals?

According to CMS data, Marissa Karpoff is affiliated with Cooper University Hospital and Main Line Hospital Lankenau.

When was this NPI record last updated?

The NPPES record for Marissa Karpoff was last updated on April 15, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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.