Eva M. Mok, M.D.
Sleep Medicine (Internal Medicine) Physician · Springfield, MA
Eva M. Mok, M.D. is a sleep medicine (internal medicine) physician with a practice address in Springfield, Massachusetts, and NPI 1124318233, issued on Apr 10, 2011. Check the license (Massachusetts 280902, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Eva M. Mok
- Credential
- M.D.
- Primary taxonomy
- Sleep Medicine (Internal Medicine) Physician 207RS0012X
- License numbers
- 280902 MA
56733 CT
RT-3284 NH
Self-reported in NPPES; status is on the state search - Practice location
- 3300 Main St, Springfield, MA 01107
- Phone
- (413) 794-5600
- Enumerated
- Apr 10, 2011
- Record last updated
- Sep 17, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20191003001200); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest sleep medicine (internal medicine) physician records → All 34 in Massachusetts → Look up another NPI →
Also registered at 3300 Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Olga Aponte, MDChild & Adolescent Psychiatry Physician1649369059
- Hany Aziz, MDCardiovascular Disease Physician1679580385
Verify Eva M. Mok in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 280902Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average sleep medicine (internal medicine) physician in 2024
85 Medicare Part D claims for 22 beneficiaries, against an average of 585 among the 852 providers of this specialty who prescribed in Part D.
Most prescribed
- Modafinil30 claims
- Gabapentin16 claims
- Ipratropium Bromide11 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: $29.54
4 payments; by number, the most common kind was food and beverage; the largest payer was Harmony Biosciences Llc. The 664 providers of this specialty with any payment received $3,724.37 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
- Baystate Medical Practices IncSpringfield, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Eva M. Mok among 34 sleep medicine (internal medicine) physician records in Massachusetts
Eva M. Mok, M.D. is one of 34 sleep medicine (internal medicine) 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 2011, is newer than 62% of them.
- NPI issued2011 · 62% of these records are older, 29% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2011 · median 2002 among the 24 with a school on file
- Record last updated2019 · 41% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RS0012X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Sleep Medicine (Internal Medicine) Physician providers in Massachusetts
There are 34 sleep medicine (internal medicine) physician records in Massachusetts.
All 34 in Massachusetts → Every provider in Springfield → Sleep Medicine (Internal Medicine) Physician nationwide →
The 8 sleep medicine (internal medicine) physician records with the nearest ZIP codes
- Stephen Derose, M.D., M.S.H.S.Springfield, MA 011071710272810
- Yifeng Lu, DOSpringfield, MA 011071417690827
- Neil Bach, MDGreenfield, MA 013011407819626
- Joseph Walek, MDGardner, MA 014401902891435
- Wassim Assaf, MDAuburn, MA 015011548400278
- Chloe Deng, D.O.Auburn, MA 015011033735428
- Christine Fitzgibbons, M.D.Westborough, MA 015811194771220
- Neil Shore, MDSalem, MA 019701346243698
Common questions
What is Eva M. Mok, M.D.'s NPI number?
Eva M. Mok, M.D.'s National Provider Identifier (NPI) is 1124318233, issued on Apr 10, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Eva M. Mok, M.D. located?
The NPPES record lists a practice address at 3300 Main St, Springfield, MA, 01107. Phone: (413) 794-5600. Providers update this record themselves, so call before visiting.
How can I verify Eva M. Mok, M.D.'s license?
NPPES lists Massachusetts license number 280902, 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 Eva M. Mok, M.D. prescribe under Medicare Part D?
In 2024, Eva M. Mok, M.D. had 85 Medicare Part D claims for 22 beneficiaries; the average among sleep medicine (internal medicine) physician prescribers was 585. 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.