1. Home
  2. Directory
  3. Massachusetts
  4. Boston
  5. Nurse Practitioner
  6. NPI Profile

MELISSA ANN AYER CNP, RN
NPI 1770059248
Nurse Practitioner in Boston, MA

Active since October 22, 2018PECOS EnrolledAccepts Medicare Assignment
55 FRUIT STREET, BOSTON, MA 02241(617) 726-9527 Get Directions Write a Review

NPPES record last updated: November 25, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Nov 25, 2025, Nov 13, 2019, Oct 1, 2019 and 1 more (4 updates tracked since 2018).

About Melissa Ann Ayer Cnp, Rn NPPES

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

MELISSA ANN AYER CNP, RN (NPI 1770059248) is an individual nurse practitioner in Boston, Massachusetts, licensed in Massachusetts (RN237363) and active in the NPI registry since October 2018. She is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and is a graduate of Other (2018).

NPPES Registry Identity

NPI1770059248
Entity TypeIndividualFemale
Primary Taxonomy363L00000X
Provider Legal NameMELISSA ANN AYERCredential: CNP, RN
Location Address55 FRUIT STREETBoston, MA 02241-1909
Mailing AddressMassachusetts General Physicians Organization, 55 Fruit StreetBoston, MA 02241-9095 · (617) 724-5058
Phone(617) 726-9527
Sole ProprietorNo
Medical School CMSOtherGraduated 2018
Enumeration DateOctober 22, 2018
Last NPPES UpdateNovember 25, 20254 updates tracked since enumeration
NPPES CertifiedNovember 25, 2025
✔ NPI 1770059248 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363L00000X
License✔ Licensed in MA · RN237363
Definition
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
Also ListedNurse Practitioner · FamilyTaxonomy 363LF0000X · License RN237363 (MA)
55 FRUIT STREET, Boston, MA 02241
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Taro Health.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

Melissa Ann Ayer Cnp, Rn 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 ID6709130776
PECOS Enrollment IDI20181109000336
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

5

Medicare enrollment records show Melissa Ayer reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Massachusetts General Physicians Organization Inc
Same address
Dermatology
55 FRUIT ST, BUL 2
Boston, MA 02114
  • Reassigned Medicare billing, Massachusetts enrollment
  • 6,360 clinicians in this Medicare group
NPI 1801874573 (617) 724-0287
The General Hospital Corporation
Same address
General Acute Care Hospital
55 FRUIT ST, BULFINCH 360
Boston, MA 02114
  • Reassigned Medicare billing, Massachusetts enrollment
  • 6,234 clinicians in this Medicare group
NPI 1023049236 (617) 726-2000
Mass General Brigham Medical Group Suburban Massachusetts Inc
9.4 mi
Family Medicine
2014 WASHINGTON STREET
Newton, MA 02462
  • Reassigned Medicare billing, Massachusetts enrollment
  • 992 clinicians in this Medicare group
NPI 1538191218 (617) 243-6262
Lahey Clinic, Inc.
12 mi
Internal Medicine
41 MALL RD, LAHEY CLINIC
Burlington, MA 01805
  • Reassigned Medicare billing, Massachusetts enrollment
  • Also billed through NPI 1063447316 (Massachusetts)
  • 1,574 clinicians in this Medicare group
NPI 1538194980 (781) 744-8000
Charter Health PC
13 mi
Internal Medicine
55 HIGHLAND AVE STE 304
Salem, MA 01970
  • Reassigned Medicare billing, Massachusetts enrollment
  • 83 clinicians in this Medicare group
NPI 1750824124 (978) 354-4611

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

Hospital Affiliations CMS Care Compare 2

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

Massachusetts General Hospital

Acute Care Hospitals · Boston, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220071
Location55 Fruit StreetBoston, MA 02114 · Suffolk County
Emergency services Birthing friendly

Newton-Wellesley Hospital

Acute Care Hospitals · Newton, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220101
Location2014 Washington StreetNewton, MA 02462 · Middlesex County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02241 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
$97.64 typical visit price
range $63.72 – $189.86
Typical copayment $24.41 (range $15.93 – $47.46)
Most-billed visit code 99203
Established Patient
$111.18 typical visit price
range $21.07 – $155.29
Typical copayment $27.79 (range $5.26 – $38.82)
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.

Referred Medical Equipment & Supplies CMS DME claims 13

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Skin barrier; solid, 4 x 4 or equivalent; each A4362
DME-Orthotic Devices · category DF010N
5 suppliers20 claims540 services$2.53 avg. paid by Medicare
Ostomy belt, each A4367
DME-Orthotic Devices · category DF010N
3 suppliers12 claims14 services$6.57 avg. paid by Medicare
Ostomy skin barrier, solid 4 x 4 or equivalent, extended wear, without built-in convexity, each A4385
DME-Orthotic Devices · category DF010N
5 suppliers19 claims740 services$4.79 avg. paid by Medicare
Ostomy deodorant, with or without lubricant, for use in ostomy pouch, per fluid ounce A4394
DME-Orthotic Devices · category DF010N
4 suppliers19 claims656 services$2.33 avg. paid by Medicare
Ostomy skin barrier, pectin-based, paste, per ounce A4406
DME-Orthotic Devices · category DF010N
4 suppliers12 claims90 services$5.51 avg. paid by Medicare
Ostomy skin barrier, with flange (solid, flexible, or accordion), extended wear, with built-in convexity, 4 x 4 inches or smaller, each A4407
DME-Orthotic Devices · category DF010N
5 suppliers42 claims1,565 services$8.24 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 11

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

MICHAEL HAINES NP
Nurse Practitioner
55 FRUIT STREET
BOSTON, MA 02241
Suffolk County (617) 726-2000
MRS. PATRICIA DULAC
Nurse Practitioner
55 FRUIT STREET
BOSTON, MA 02241
Suffolk County (617) 726-2000
ETHAN MORRIS PA
Physician Assistant (Medical)
55 FRUIT STREET
BOSTON, MA 02241
Suffolk County (617) 726-2000
ALICHIA LOUISE PATON ACNP
Nurse Practitioner
55 FRUIT STREET
BOSTON, MA 02241
Suffolk County (212) 724-6113
JESSICA MIAE BANG-SCHAEFER PA-C
Physician Assistant
55 FRUIT STREET
BOSTON, MA 02241
Suffolk County (617) 724-3874
HEIDI HERCHEN ACNPC-AG
Nurse Practitioner (Acute Care)
55 FRUIT STREET
BOSTON, MA 02241
Suffolk County (617) 726-2000
SIOBHAN ELIZABETH KELLY
Nurse Practitioner
55 FRUIT STREET
BOSTON, MA 02241
Suffolk County (617) 726-2000
ALLIE WALPERT CNP
Nurse Practitioner
55 FRUIT STREET
BOSTON, MA 02241
Suffolk County (617) 726-1696

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 Melissa Ayer's NPI number?

The NPI number for Melissa Ayer is 1770059248. It was assigned to this individual provider in the NPPES registry on October 22, 2018.

Where is Melissa Ayer located?

Melissa Ayer practices at 55 Fruit Street, Boston, MA 02241. The listed phone number is (617) 726-9527.

What is Melissa Ayer's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Is Melissa Ayer enrolled in Medicare?

Yes. Melissa Ayer 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 Melissa Ayer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Melissa Ayer reassigns Medicare benefits to 5 organizations: Massachusetts General Physicians Organization Inc (Boston, MA), The General Hospital Corporation (Boston, MA), Mass General Brigham Medical Group Suburban Massachusetts Inc (Newton, MA), Lahey Clinic, Inc. (Burlington, MA) and Charter Health PC (Salem, MA). 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 Melissa Ayer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Melissa Ayer accept?

Health plans from Taro Health list Melissa Ayer 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 Melissa Ayer affiliated with any hospitals?

According to CMS data, Melissa Ayer is affiliated with Massachusetts General Hospital and Newton-Wellesley Hospital.

When was this NPI record last updated?

The NPPES record for Melissa Ayer was last updated on November 25, 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.