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CHELSEA ERIN MARKS D.O.
NPI 1023371754
Obstetrics & Gynecology in Hanover, PA

Active since June 18, 2012PECOS EnrolledAccepts Medicare Assignment
20 NORTH ST, HANOVER, PA 17331(717) 637-7755(717) 637-7142 Get Directions Write a Review

NPPES record last updated: December 31, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Dec 31, 2025, Jan 13, 2017, Oct 12, 2016 and 1 more (4 updates tracked since 2016).

About Chelsea Erin Marks D.o. NPPES

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

CHELSEA ERIN MARKS D.O. (NPI 1023371754) is an individual obstetrics & gynecology provider in Hanover, Pennsylvania, licensed in Pennsylvania (OS018285) and active in the NPI registry since June 2012. She is enrolled in Medicare PECOS, is affiliated with Reading Hospital, and is a graduate of Philadelphia College Of Osteopathic Medicine (2012).

NPPES Registry Identity

NPI1023371754
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameCHELSEA ERIN MARKSCredential: D.O.
Location Address20 NORTH STHanover, PA 17331-2275
Mailing Address20 North StHanover, PA 17331-2275 · (717) 637-7755 · Fax (717) 637-7142
Phone(717) 637-7755
Fax(717) 637-7142
Sole ProprietorNo
Medical School CMSPhiladelphia College Of Osteopathic MedicineGraduated 2012
Enumeration DateJune 18, 2012
Last NPPES UpdateDecember 31, 20254 updates tracked since enumeration
NPPES CertifiedDecember 31, 2025
✔ NPI 1023371754 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in PA · OS018285
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.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
20 NORTH ST, Hanover, PA 17331
Open in Google Maps ↗

Other Identifiers 1

OtherPO1727515PA · Railroad

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, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Chelsea Erin Marks D.o. 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 ID7618264136
PECOS Enrollment IDI20160928000149
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 2

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

Reading Hospital

Acute Care Hospitals · West Reading, PA
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number390044
Location420 S 5th AvenueWest Reading, PA 19611 · Berks County
Emergency services Birthing friendly

Upmc Hanover

Acute Care Hospitals · Hanover, PA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number390233
Location300 Highland AveHanover, PA 17331 · York County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 17331 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.

Other Providers at the Same Location NPPES 15

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

MRS. ANITA E ASHTON P.A.-C
Physician Assistant
20 NORTH ST
HANOVER, PA 17331
York County (717) 637-7755
DANIEL F P VICTORIA M.D.
Obstetrics & Gynecology
20 NORTH ST
HANOVER, PA 17331
York County (717) 637-7755
NICHOLE REDDING
Nurse Practitioner (Family)
20 NORTH ST
HANOVER, PA 17331
York County (717) 637-7755
PINNACLE HEALTH MEDICAL SERVICES
Obstetrics & Gynecology
20 NORTH ST
HANOVER, PA 17331
York County (717) 637-7755
JENNIFER KNICKMAN CRNP
Nurse Practitioner (Primary Care)
20 NORTH ST
HANOVER, PA 17331
York County (717) 637-7755
COURTNEY LEIGH MUJIC C.N.M.
Advanced Practice Midwife
20 NORTH ST
HANOVER, PA 17331
York County (717) 637-7755
LARISSA CROWNOVER
Midwife
20 NORTH ST
HANOVER, PA 17331
York County (717) 637-7755
ALEXIS SHANABROOK
Physician Assistant
20 NORTH ST
HANOVER, PA 17331
York County (717) 637-7755

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 Chelsea Marks's NPI number?

The NPI number for Chelsea Marks is 1023371754. It was assigned to this individual provider in the NPPES registry on June 18, 2012.

Where is Chelsea Marks located?

Chelsea Marks practices at 20 North St, Hanover, PA 17331. The listed phone number is (717) 637-7755.

What is Chelsea Marks's specialty?

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

Is Chelsea Marks enrolled in Medicare?

Yes. Chelsea Marks 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.

What insurance does Chelsea Marks accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Buckeye Health Plan list Chelsea Marks 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.

Is Chelsea Marks affiliated with any hospitals?

According to CMS data, Chelsea Marks is affiliated with Reading Hospital and Upmc Hanover.

When was this NPI record last updated?

The NPPES record for Chelsea Marks was last updated on December 31, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.