Rachel Mao, FNP
NPI 1427556265 · Nurse Practitioner · Greenfield, MA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Rachel Mao, FNP is a Nurse Practitioner provider in Greenfield, MA (NPI 1427556265).
Provider details
- NPI number
- 1427556265
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Female
- Sole proprietor
- No
- License
- RN2260275 (MA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
8 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
472 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 184 | $82 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 91 | $55 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 38 | $69 |
| Telephone Medical Discussion With Physician, 5-10 Minutes99441 | 37 | $47 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 35 | $112 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 233 | 92 |
| Pantoprazole Sodium | 193 | 71 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 176 | 174 |
| Famotidine | 129 | 51 |
| Linaclotidebrand: Linzess | 119 | 22 |
| Dicyclomine Hcl | 85 | 36 |
| Peg3350/Sod Sul/Nacl/Kcl/Asb/Cbrand: Plenvu | 38 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$135 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-01-26
- Last updated
- 2018-01-26
Frequently asked questions
- What is Rachel Mao's NPI number?
- Rachel Mao's National Provider Identifier (NPI) is 1427556265, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Rachel Mao's specialty?
- Rachel Mao is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Rachel Mao located?
- Rachel Mao's practice location on file with NPPES is 48 Sanderson St Ste 2, Greenfield, MA 01301-2779.
- What is Rachel Mao's phone number?
- The practice phone number listed in the NPPES registry for Rachel Mao is (413) 773-2655.
- Does Rachel Mao accept Medicare?
- Rachel Mao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Rachel Mao's NPI active?
- Yes — Rachel Mao's NPI (1427556265) is active in the NPPES registry as of the last update on 2018-01-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.