DR. JOHN J WEITER (MD PHD) – Ophthalmology Physician, NPI 1992795421

DR. JOHN J WEITER (MD PHD) is a healthcare provider. based in Cambridge, Massachusetts. specializing in OPHTHALMOLOGY. They hold the professional credentials MD PHD. They hold a License No. 37856 (MA). The NPI Number for DR. JOHN J WEITER (MD PHD) is 1992795421

Main info

Male
58 Years Of Experience
Accepts Medicare Assignment
Name
DR. JOHN J WEITER (MD PHD)
NPI
1992795421
Phone
(617) 864-6350
Address
2285 MASSACHUSETTS AVE
Enumeration Date
26 October 2005
Last Update Date
9 April 2024

Doctor Profile

Medical School Name
UNIVERSITY OF CHICAGO, PRITZKER SCHOOL OF MEDICINE
Secondary Phone
9788545090
Graduation Year
1968 (58 years ago)
PAC ID
6103866983
Group Practice PAC ID
4789820010
Professional Enrollment ID
I20050511000473
Address ID
MA019601666PE39XXXSTXX301
Data current as of
19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology
Experience69
Completeness75
Years active:20State licenses:1Digital endpointsOther names

801 OPHTHALMOLOGY in MA

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Provider Addresses for DR. JOHN J WEITER (MD PHD)

  • 2285, Massachusetts Avenue, North Cambridge, Cambridge, Middlesex County, Massachusetts, 02140, United States

    CAMBRIDGE, MA 021401226

    Phone: (617) 864-6350

    Fax: (617) 864-6437

    Type: Location

  • Charlestown Post Office (mobile), Pattern Close, St Austell Bay, Charlestown, Cornwall, England, PL25 3FQ, United Kingdom

    MASS GENERAL PHYSICIAN ORGANIZATION

    CHARLESTOWN, MA 021299142

    Phone: (617) 724-0287

    Fax: (617) 726-2894

    Type: Mailing

  • 39 CROSS ST STE 201

    PEABODY, MA 019601666

    Phone: (978) 854-5090

    Fax: (978) 854-5755

    Type: Location

  • 100 Milk St Ste 7

    Methuen, MA 018444600

    Phone: (978) 854-5090

    Fax: (978) 984-7158

    Type: Location

  • 1 Washington St Ste 304

    Wellesley, MA 024811706

    Phone: (978) 854-5090

    Fax: (978) 854-5755

    Type: Location

NPPES updates history

No NPPES updates recorded for this provider.

Prescription Activity

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Open Payments (CMS)

CMS reports 1 Open Payments records for all available years, with a total value of $20.

Total Amount is formed as General ($20) + Research ($0) + Ownership ($0) = $20.

Last reported payment date: 2023-10-18 • Largest payer in this snapshot: ABBVIE INC. ($20).

Total Amount

$20

General + Research + Ownership

Payments

1

Total payment records

General Amount

$20

General payments

Research Amount

$0

Research funding

Ownership Amount

$0

Ownership interests

Ownership Count

0

Ownership records

Last Payment Date

2023-10-18

Latest reported date

Top Companies

Largest payers in this snapshot

CompanyAmount
ABBVIE INC.$20
View all Open Payments →|Open Payments Risk Radar →

Medicare Enrollment & Revalidation

Source: CMS public data · Not endorsed by CMS ·

Educational use only—not medical, billing, or legal advice.

PECOS enrollment status

Participating (accepts Medicare assignment)

Enrollment effective: 2005-05-11

PECOS data refreshed: 2026-05-27

Medicare revalidation (CMS due date list)

Due date not assigned yet

CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.

Enrollment records

1

Earliest due date

Not assigned (TBD)

CMS data updated

2026-06-01

Revalidation progress

  1. Medicare enrolled
  2. On CMS revalidation list
  3. Due date assigned
  4. Revalidate in PECOS

CMS enrollment records

Enrollment IDTypeSpecialtyStateDue date
I20050511000473IOphthalmologyMATBD

What to do next

  • No action required while the due date shows TBD.
  • Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
  • Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.

Verify on CMS Revalidation Lookup Tool

Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS

Medicare Utilization (FFS)

Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·

Educational use only—not medical, billing, or legal advice.

Top Medicare procedures (2023) · refreshed 2026-05-27

HCPCSDescriptionServicesBeneficiariesMedicare allowed
92134Imaging of retina693358$0
92014Established patient complete exam of visual system664374$0
67028Injection of drug into eye15348$0
J9035Injection, bevacizumab, 10 mg12242$0
92133Imaging of optic nerve10967$0
View full utilization report →

Insurance plans in this area (ZIP 02140)

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Provider's Procedures

DR. JOHN J WEITER (MD PHD) performs procedures in OPHTHALMOLOGY. See the list of HCPCS codes below.
SpecialtyPractice State
HCPCS Code
Description
Service Count
Beneficiary Count
OPHTHALMOLOGYMA92012Eye and medical examination for diagnosis and treatment, established patient14090

Group practice members

Group practice members are other physicians who share the same Group Practice PAC ID with this doctor. When doctors form a group practice and register in PECOS as a single entity, they receive a shared identification number. This table lists all providers in the same group practice.
PAC ID: 4789820010View full group profile
NameSpecialtyState
O P H T H A L M O L O G YMA
O P H T H A L M O L O G YMA

Reviews

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Frequently asked questions

Can I verify DR. JOHN J WEITER (MD PHD) with an NPI only?
You can start verification with NPI 1992795421 for DR. JOHN J WEITER (MD PHD), then check state licensing separately.
Can I rely on DR. JOHN J WEITER (MD PHD) being an active provider?
As of the registry snapshot, DR. JOHN J WEITER (MD PHD) is marked active.
What taxonomy line describes DR. JOHN J WEITER (MD PHD)?
For research purposes, treat DR. JOHN J WEITER (MD PHD) as Ophthalmology Physician in this dataset. Clinical services aligned with this taxonomy classification.
Where should I expect DR. JOHN J WEITER (MD PHD) on a map?
Expect Cambridge, Massachusetts as a primary anchor for DR. JOHN J WEITER (MD PHD) unless the record lists multiple sites.
Is specialty guaranteed by NPI alone?
Taxonomy selections describe intent; scope of practice still follows state law.

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