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DR. ALLISON NICOLE WALSH MD
NPI 1801107487
Obstetrics & Gynecology in New York, NY

Active since June 29, 2010PECOS EnrolledAccepts Medicare Assignment
525 E 68TH ST, NEW YORK, NY 10065(212) 746-5454 Get Directions Write a Review

NPPES record last updated: November 18, 2025. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Nov 18, 2025, Aug 7, 2025, Jun 26, 2024 (3 updates tracked since 2024).

About Dr. Allison Nicole Walsh Md NPPES

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

DR. ALLISON NICOLE WALSH MD (NPI 1801107487) is an individual obstetrics & gynecology provider in New York, New York, licensed in Missouri (2013040818) and active in the NPI registry since June 2010. She is enrolled in Medicare PECOS, is affiliated with Mercy Hospital St Louis, and maintains a secondary practice location in Saint Louis.

NPPES Registry Identity

NPI1801107487
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameDR. ALLISON NICOLE WALSHCredential: MD
Location Address525 E 68TH STNew York, NY 10065-4870
Mailing Address456 N New Ballas Rd Ste 369Saint Louis, MO 63141-6846 · (314) 567-5017 · Fax (314) 414-1770
Phone(212) 746-5454
Sole ProprietorYes
Medical School CMSOtherGraduated 2010
Enumeration DateJune 29, 2010
Last NPPES UpdateNovember 18, 20253 updates tracked since enumeration
NPPES CertifiedNovember 18, 2025
✔ NPI 1801107487 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
Licenses✔ Licensed in MO · 2013040818✔ Licensed in AR · E-16866✔ Licensed in FL · TPME5859✔ Licensed in IL · 36.165628✔ Licensed in MO · 2010018516
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.
525 E 68TH ST, New York, NY 10065
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Secondary Practice Location 1

Location 1456 N New Ballas Rd Ste 369Saint Louis, MO 63141-6846 · Phone (314) 567-5017 · Fax (314) 414-1770

Other Identifiers 1

Other2013040818MO · State License Number

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Allison Nicole Walsh Md 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 ID5890926281
PECOS Enrollment IDI20140328000253, I20250716000215
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 Reassignments

3

Medicare enrollment records show Allison Walsh reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Weill Medical College Of Cornell
Same address
Obstetrics & Gynecology
525 E 68TH ST
New York, NY 10065
  • Reassigned Medicare billing, New York enrollment
  • 109 clinicians in this Medicare group
NPI 1013958610 (212) 590-5151
Montefiore New Rochelle Hospital
15 mi
General Acute Care Hospital
100 CORPORATE DR, PROVIDER INFORMATION
Yonkers, NY 10701
  • Reassigned Medicare billing, New York enrollment
  • 211 clinicians in this Medicare group
NPI 1295163244 (914) 377-4722
Obstetrics & Gynecology Care LLC
890 mi
Obstetrics & Gynecology
621 S NEW BALLAS RD, SUITE 4008
Saint Louis, MO 63141
  • Reassigned Medicare billing, Missouri enrollment
  • 3 clinicians in this Medicare group
NPI 1184901704 (314) 210-9057

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 5

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 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.
207 services97 patients
Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory Q0091
A Papanicolaou smear, often called a Pap smear, is a test to check for changes in cells. A small sample is gently collected from the lower region and sent to a lab for examination. This helps in early detection of potential health issues.
34 services34 patients
Dxa bone density measurement of hip, pelvis, spine 77080
A DXA bone density measurement is a simple, quick, and non-invasive procedure that assesses the strength of your bones. This test uses X-rays to measure the amount of minerals, mainly calcium, in the hip, pelvis, and spine. It helps in early detection of osteoporosis or other bone diseases.
32 services32 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.
13 services13 patients
Cervical or vaginal cancer screening; pelvic and clinical breast examination G0101
This procedure involves checking for health issues in the lower abdomen and chest area. It helps identify early signs of certain conditions, increasing the chance for successful treatment. It's a routine check-up that's important for maintaining good health.
11 services11 patients

Hospital Affiliations CMS Care Compare 3

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

Mercy Hospital St Louis

Acute Care Hospitals · Saint Louis, MO
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260020
Location615 New Ballas RoadSaint Louis, MO 63141 · St. Louis County
Emergency services Birthing friendly

Mercy Hospital South

Acute Care Hospitals · Saint Louis, MO
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260077
Location10010 Kennerly RoadSaint Louis, MO 63128 · St. Louis County
Emergency services

St Lukes Hospital

Acute Care Hospitals · Chesterfield, MO
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260179
Location232 S Woods Mill RdChesterfield, MO 63017 · St. Louis County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 10065 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
$150.24 typical visit price
range $65.69 – $198.19
Typical copayment $37.56 (range $16.42 – $49.54)
Most-billed visit code 99204
Established Patient
$81.44 typical visit price
range $21.20 – $160.66
Typical copayment $20.36 (range $5.30 – $40.16)
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 20

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

DR. AKILI HINSON M.D.
Surgery
525 E 68TH ST
NEW YORK, NY 10065
New York County (212) 746-5454
ABBY AVGERINOS
Nurse Practitioner (Adult Health)
525 E 68TH ST
NEW YORK, NY 10065
New York County (610) 742-3894
DR. PAMELA JOAN-YIN TIEU M.D.
Hospitalist
525 E 68TH ST
NEW YORK, NY 10065
New York County (212) 746-5454
JENNIFER ANNE SOO HOO MD
Physical Medicine & Rehabilitation (Sports Medicine)
525 E 68TH ST
NEW YORK, NY 10065
New York County (212) 746-1500
WEILL MEDICAL COLLEGE OF CORNELL
Specialist
525 E 68TH ST
NEW YORK, NY 10065
New York County (212) 746-2846
MS. RACHAEL HALEY BLAIRE PA-C
Physician Assistant
525 E 68TH ST
NEW YORK, NY 10065
New York County (480) 221-9894
DR. NISHA MEHTA-NAIK M.D.
Psychiatry & Neurology (Psychiatry)
525 E 68TH ST, MAIL SLOT 140
NEW YORK, NY 10065
New York County (212) 746-3720
POOJA SHAH SALVI
Student in an Organized Health Care Education/Training Program
525 E 68TH ST
NEW YORK, NY 10065
New York County (646) 962-8413

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 Allison Walsh's NPI number?

The NPI number for Allison Walsh is 1801107487. It was assigned to this individual provider in the NPPES registry on June 29, 2010.

Where is Allison Walsh located?

Allison Walsh practices at 525 E 68th St, New York, NY 10065. The listed phone number is (212) 746-5454.

What is Allison Walsh's specialty?

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

Is Allison Walsh enrolled in Medicare?

Yes. Allison Walsh 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.

Which organizations bill Medicare for Allison Walsh's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Allison Walsh reassigns Medicare benefits to 3 organizations: Weill Medical College Of Cornell (New York, NY), Montefiore New Rochelle Hospital (Yonkers, NY) and Obstetrics & Gynecology Care LLC (Saint Louis, MO). Each 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 Allison Walsh's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Allison Walsh accept?

Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan, Ambetter of Oklahoma and Ambetter of Tennessee and 1 other insurer list Allison Walsh 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 Allison Walsh affiliated with any hospitals?

According to CMS data, Allison Walsh is affiliated with Mercy Hospital St Louis, Mercy Hospital South and St Lukes Hospital.

When was this NPI record last updated?

The NPPES record for Allison Walsh was last updated on November 18, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.