Crystal Marie Williams, FNP-BC
Family Nurse Practitioner · Northampton, MA
Crystal Marie Williams, FNP-BC is a family nurse practitioner with a practice address in Northampton, Massachusetts, and NPI 1639604754, issued on Apr 26, 2017. Check the license (Massachusetts RN2261796, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Crystal Marie Williams
- Credential
- FNP-BC
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- RN2261796 MA
Self-reported in NPPES; status is on the state search - Practice location
- 325B King St, Northampton, MA 01060
- Phone
- (413) 387-4100
- Enumerated
- Apr 26, 2017
- Record last updated
- Aug 16, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (413) 387-4119
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 4,724 in Massachusetts → Look up another NPI →
Also registered at 325B King St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Crystal Marie Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license RN2261796Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average family nurse practitioner in 2024
22 Medicare Part D claims for 12 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Crystal Marie Williams among 4,724 family nurse practitioner records in Massachusetts
Crystal Marie Williams, FNP-BC is one of 4,724 family nurse practitioner records with a practice address in Massachusetts. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 44% of them.
- NPI issued2017 · 44% of these records are older, 51% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileNo · 57% of these records are
- Record last updated2018 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
23 family nurse practitioner records list a practice address in Northampton
They are 23 of the 1,816 NPPES records with a practice address in Northampton, and 4,724 family nurse practitioner records in Massachusetts.
All 4,724 in Massachusetts → Every provider in Northampton → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Marisela Fermin-Schon, MSN, FNP-CNorthampton, MA 010601568871325
- Glenda Flynn, NPNorthampton, MA 010601023030558
- Michelle Goulet, FNPNorthampton, MA 010601609847565
- Kate Hamilton, NPNorthampton, MA 010601346873304
- Jenifer Hanrahan, APRNNorthampton, MA 010601831383322
- Barbara Henrichon, RN MS APRN BC FNPNorthampton, MA 010601508051558
- Katherine Kelly, FNPNorthampton, MA 010601528307816
- Kelly Malone, FNP-BCNorthampton, MA 010601255880753
Common questions
What is Crystal Marie Williams, FNP-BC's NPI number?
Crystal Marie Williams, FNP-BC's National Provider Identifier (NPI) is 1639604754, issued on Apr 26, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Crystal Marie Williams, FNP-BC located?
The NPPES record lists a practice address at 325B King St, Northampton, MA, 01060. Phone: (413) 387-4100. Providers update this record themselves, so call before visiting.
How can I verify Crystal Marie Williams, FNP-BC's license?
NPPES lists Massachusetts license number RN2261796, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Crystal Marie Williams, FNP-BC prescribe under Medicare Part D?
In 2024, Crystal Marie Williams, FNP-BC had 22 Medicare Part D claims for 12 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.