Kelsey Sack, MD/PHD
Pulmonary Disease Physician · Boston, MA
Kelsey Sack, MD/PHD is a pulmonary disease physician with a practice address in Boston, Massachusetts, and NPI 1710415344, issued on May 26, 2017. Check the license (Massachusetts 272220, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Kelsey Sack
- Credential
- MD/PHD
- Primary taxonomy
- Pulmonary Disease Physician 207RP1001X
- License number
- 272220 MA
Self-reported in NPPES; status is on the state search - Practice location
- 330 Brookline Ave, Boston, MA 02215
- Phone
- (617) 667-7000
- Enumerated
- May 26, 2017
- Record last updated
- Nov 13, 2025
- Medicare enrollment
- Enrolled (PECOS I20240708002125); accepts Medicare assignment
- Medical or professional school
- Boston University School Of Medicine, 2017
- Entity
- Type 1 · individual
8 nearest pulmonary disease physician records → All 569 in Massachusetts → Look up another NPI →
Also registered at 330 Brookline Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Kelsey Sack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 272220Check 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 pulmonary disease physician in 2024
31 Medicare Part D claims, against an average of 1,425 among the 11,596 providers of this specialty who prescribed in Part D. Brand-name drugs were 68% of claims.
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.
Industry payments in 2024: $82,500.00
1 payment: grant; the largest payer was Csl Behring. The 8,806 providers of this specialty with any payment received $5,159.88 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Harvard Medical Faculty Phys AT Beth Israel Deaconess Med Ctr IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kelsey Sack among 569 pulmonary disease physician records in Massachusetts
Kelsey Sack, MD/PHD is one of 569 pulmonary disease physician records with a practice address in Massachusetts. 82% 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 91% of them.
- NPI issued2017 · 91% of these records are older, 6% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2017 · median 2003 among the 407 with a school on file
- Record last updated2025 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RP1001X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pulmonary Disease Physician providers in Massachusetts
There are 569 pulmonary disease physician records in Massachusetts.
All 569 in Massachusetts → Every provider in Boston → Pulmonary Disease Physician nationwide →
The 8 pulmonary disease physician records with the nearest ZIP codes
- Asha Anandaiah, MDBoston, MA 022151184627481
- Douglas Beach, MDBoston, MA 022151750366977
- Jacqueline Chang, M.D.Boston, MA 022151003929696
- Sean Gilman, M.D.Boston, MA 022151003916065
- Geoffrey Gilmartin, M.D.Boston, MA 022151770572851
- Nancy Lange-Vaidya, M.D., M.P.H.Boston, MA 022151730105529
- Adnan Majid, MDBoston, MA 022151790797561
- Heidi O'Connor, M.D.Boston, MA 022151902812506
Common questions
What is Kelsey Sack, MD/PHD's NPI number?
Kelsey Sack, MD/PHD's National Provider Identifier (NPI) is 1710415344, issued on May 26, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Kelsey Sack, MD/PHD located?
The NPPES record lists a practice address at 330 Brookline Ave, Boston, MA, 02215. Phone: (617) 667-7000. Providers update this record themselves, so call before visiting.
How can I verify Kelsey Sack, MD/PHD's license?
NPPES lists Massachusetts license number 272220, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Kelsey Sack, MD/PHD prescribe under Medicare Part D?
In 2024, Kelsey Sack, MD/PHD had 31 Medicare Part D claims; the average among pulmonary disease physician prescribers was 1,425. 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.