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DR. MARIELLE SOPHIA GROSS M.D.
NPI 1023420486
Obstetrics & Gynecology in Chambersburg, PA

Active since May 20, 2014PECOS EnrolledAccepts Medicare Assignment
77.5/100
CMS Quality Rating
12 ST PAUL DR, CHAMBERSBURG, PA 17201(717) 217-6882(717) 255-0157 Get Directions Write a Review

NPPES record last updated: March 18, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Dr. Marielle Sophia Gross M.d. NPPES

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

DR. MARIELLE SOPHIA GROSS M.D. (NPI 1023420486) is an individual obstetrics & gynecology provider in Chambersburg, Pennsylvania, licensed in Pennsylvania (MD470686) and active in the NPI registry since May 2014. She is enrolled in Medicare PECOS, is affiliated with Wellspan Chambersburg Hospital, and is a graduate of University Of Florida College Of Medicine (2014).

NPPES Registry Identity

NPI1023420486
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameDR. MARIELLE SOPHIA GROSSCredential: M.D.
Location Address12 ST PAUL DRChambersburg, PA 17201-1035
Mailing Address601 Memory LnYork, PA 17402-2231 · (717) 851-1405 · Fax (717) 851-6969
Phone(717) 217-6882
Fax(717) 255-0157
Sole ProprietorYes
Medical School CMSUniversity Of Florida College Of MedicineGraduated 2014
Enumeration DateMay 20, 2014
Last NPPES UpdateMarch 18, 2026
NPPES CertifiedMarch 18, 2026
✔ NPI 1023420486 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
Licenses✔ Licensed in PA · MD470686✔ Licensed in PA · FG7823378✔ Licensed in MD · 4404
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
12 ST PAUL DR, Chambersburg, PA 17201
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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

Dr. Marielle Sophia Gross 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 ID8729357082
PECOS Enrollment IDI20200722003281
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.

Hospital Affiliations CMS Care Compare

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

Wellspan Chambersburg Hospital

Acute Care Hospitals · Chambersburg, PA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number390151
Location112 North Seventh StreetChambersburg, PA 17201 · Franklin County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 17201 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
$126.34 typical visit price
range $54.64 – $166.87
Typical copayment $31.58 (range $13.66 – $41.71)
Most-billed visit code 99204
Established Patient
$68.36 typical visit price
range $17.33 – $135.84
Typical copayment $17.09 (range $4.33 – $33.96)
Most-billed visit code 99213
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.

77.5/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality68.61
Promoting Interoperability100
Improvement Activities40
Cost56.4

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.

SARAH ELIZABETH ECKERSLEY PA-S
Physician Assistant (Medical)
12 ST PAUL DR
CHAMBERSBURG, PA 17201
Franklin County (717) 217-6882
IMANEH FALLAHI MD
Internal Medicine (Endocrinology, Diabetes & Metabolism)
12 ST PAUL DR
CHAMBERSBURG, PA 17201
Franklin County (717) 217-6820
WELLSPAN MEDICAL GROUP
Radiology (Vascular & Interventional Radiology)
12 ST PAUL DR
CHAMBERSBURG, PA 17201
Franklin County (717) 217-6026
BRIAN DUNLAP CRNA
Nurse Anesthetist, Certified Registered
12 ST PAUL DR
CHAMBERSBURG, PA 17201
Franklin County (717) 217-6072
BRITTANY BAIRD RD
Dietitian, Registered
12 ST PAUL DR, WELLSPAN ENDOCRINOLOGY
CHAMBERSBURG, PA 17201
Franklin County (717) 217-6820
DR. BRANSON HUNTER ALLEN MD
Obstetrics & Gynecology
12 ST PAUL DR
CHAMBERSBURG, PA 17201
Franklin County (717) 217-6882
LOUISA SMITH NP
Nurse Practitioner
12 ST PAUL DR
CHAMBERSBURG, PA 17201
Franklin County (717) 217-6882
RACHAEL LEIGH SANDERS PA-C
Physician Assistant (Medical)
12 ST PAUL DR
CHAMBERSBURG, PA 17201
Franklin County (717) 217-6026

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 Marielle Gross's NPI number?

The NPI number for Marielle Gross is 1023420486. It was assigned to this individual provider in the NPPES registry on May 20, 2014.

Where is Marielle Gross located?

Marielle Gross practices at 12 St Paul Dr, Chambersburg, PA 17201. The listed phone number is (717) 217-6882.

What is Marielle Gross's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Marielle Gross enrolled in Medicare?

Yes. Marielle Gross 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 Marielle Gross affiliated with any hospitals?

According to CMS data, Marielle Gross is affiliated with Wellspan Chambersburg Hospital.

When was this NPI record last updated?

The NPPES record for Marielle Gross was last updated on March 18, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.