NPPES file of Aug 9, 2026

Ryan Drizen, DC

Chiropractor · Stow, MA

Ryan Drizen, DC is a chiropractor with a practice address in Stow, Massachusetts, and NPI 1184485237, issued on Jan 17, 2024. Check the license (Massachusetts CHI3849, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1184485237
Name
Ryan Drizen
Credential
DC
Primary taxonomy
Chiropractor 111N00000X
License number
CHI3849 MA
Self-reported in NPPES; status is on the state search
Practice location
118 Great RD, Stow, MA 01775
Phone
(978) 897-1770
Enumerated
Jan 17, 2024
Record last updated
Nov 6, 2025
Fax
(978) 897-1715
Medicare enrollment
Enrolled (PECOS I20240206002699); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest chiropractor records → All 1,577 in Massachusetts → Look up another NPI →

Also registered at 118 Great RD

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Olivia BernasOccupational Therapist1295686939
  2. Meredith BianchiOccupational Therapist1568217768
  3. Amanda CiullaSpeech-Language Pathologist1780528083
  4. Margaret Klepacz, DDSGeneral Practice Dentistry1073572517
  5. Molly LahiffSpeech-Language Pathologist1194498865
  6. Todd Whittemore, D.C.Chiropractor1447304225

Verify Ryan Drizen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
    Search for license CHI3849    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Massachusetts license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through 2 group practices

  1. Bay State Physical Therapy OF Randolph IncQuincy, MA
  2. The Whittemore Group, Inc.Stow, MA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Ryan Drizen among 1,577 chiropractor records in Massachusetts

Ryan Drizen, DC is one of 1,577 chiropractor records with a practice address in Massachusetts. 17% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2024, is newer than 96% of them.

  • NPI issued2024 · 96% of these records are older, 3% newer
  • In a Medicare fileYes · 17% of these records are
  • In the CMS Doctors and Clinicians fileYes · 45% of these records are
  • Graduated2023 · median 1999 among the 713 with a school on file
  • Record last updated2025 · 79% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 111N00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

2 chiropractor records list a practice address in Stow

They are 2 of the 59 NPPES records with a practice address in Stow, and 1,577 chiropractor records in Massachusetts.

All 1,577 in Massachusetts → Every provider in Stow → Chiropractor nationwide →

The 8 chiropractor records with the nearest ZIP codes

  1. Todd Whittemore, D.C.Stow, MA 017751447304225
  2. Monica Green, DCSudbury, MA 017761508381674
  3. Jennifer LeesSudbury, MA 017761033533906
  4. Robert Maier, DCSudbury, MA 017761285615732
  5. Laura Nathanson, D.C.Sudbury, MA 017761235231176
  6. Richard Stone, D.C.Sudbury, MA 017761649372335
  7. Grace Cherubino, DCSouthborough, MA 017721780106955
  8. Christabella Cherubino, D.C.Southborough, MA 017721699049544

Common questions

What is Ryan Drizen, DC's NPI number?

Ryan Drizen, DC's National Provider Identifier (NPI) is 1184485237, issued on Jan 17, 2024. An NPI identifies a provider in billing; it is not a license.

Where is Ryan Drizen, DC located?

The NPPES record lists a practice address at 118 Great RD, Stow, MA, 01775. Phone: (978) 897-1770. Providers update this record themselves, so call before visiting.

How can I verify Ryan Drizen, DC's license?

NPPES lists Massachusetts license number CHI3849, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.