Kristin J. Ishac, NP-C
Nurse Practitioner · Boston, MA
Kristin J. Ishac, NP-C is a nurse practitioner with a practice address in Boston, Massachusetts, and NPI 1528505476, issued on Jan 30, 2017. Check the license (Massachusetts RN212307, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Kristin J. Ishac
- Credential
- NP-C
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- RN212307 MA
Self-reported in NPPES; status is on the state search - Practice location
- 133 Brookline Ave, Boston, MA 02215
- Phone
- (617) 421-2686
- Enumerated
- Jan 30, 2017
- Record last updated
- Dec 8, 2017 (not updated in 9 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20180301001351); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 3,480 in Massachusetts → Look up another NPI →
Also registered at 133 Brookline Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Kristin J. Ishac in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license RN212307Check 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 nurse practitioner in 2024
27 Medicare Part D claims for 15 beneficiaries, against an average of 1,109 among the 54,319 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.
Bills Medicare through one group practice
- Hebrew Rehabilitation CenterRoslindale, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kristin J. Ishac among 3,480 nurse practitioner records in Massachusetts
Kristin J. Ishac, NP-C is one of 3,480 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 55% of them.
- NPI issued2017 · 55% of these records are older, 41% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 56% of these records are
- Graduated2017 · median 2017 among the 1,963 with a school on file
- Record last updated2017 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
961 nurse practitioner records list a practice address in Boston
They are 961 of the 41,865 NPPES records with a practice address in Boston, and 3,480 nurse practitioner records in Massachusetts.
All 3,480 in Massachusetts → Every provider in Boston → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Lois Bartels, NPBoston, MA 022151811078868
- Maura Brain, MS, RNCBoston, MA 022151003824392
- Lorraine Britting, NPCBoston, MA 022151053399238
- Deidre Buckley, NPBoston, MA 022151790858975
- Diane Chase, NPBoston, MA 022151780653980
- Sigal Dagiely, NPBoston, MA 022151295813509
- Judith Ferraro, CRNPBoston, MA 022151215007356
- Jan Fleischman, MSN, RN, APN, BCBoston, MA 022151144320912
Common questions
What is Kristin J. Ishac, NP-C's NPI number?
Kristin J. Ishac, NP-C's National Provider Identifier (NPI) is 1528505476, issued on Jan 30, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Kristin J. Ishac, NP-C located?
The NPPES record lists a practice address at 133 Brookline Ave, Boston, MA, 02215. Phone: (617) 421-2686. Providers update this record themselves, so call before visiting.
How can I verify Kristin J. Ishac, NP-C's license?
NPPES lists Massachusetts license number RN212307, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Kristin J. Ishac, NP-C prescribe under Medicare Part D?
In 2024, Kristin J. Ishac, NP-C had 27 Medicare Part D claims for 15 beneficiaries; the average among nurse practitioner prescribers was 1,109. 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.