John Michael O'Block, O.D.
Optometrist · Derry, NH
John Michael O'Block, O.D. is an optometrist with a practice address in Derry, New Hampshire, and NPI 1427200724, issued on Oct 17, 2008. Check the license (New Hampshire 0823, as entered in NPPES) with the New Hampshire board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- John Michael O'Block
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 0823 NH
Self-reported in NPPES; status is on the state search - Practice location
- 6 Tsienneto Road Suite 101, Derry, NH 03038
- Phone
- (603) 434-4193
- Enumerated
- Oct 17, 2008
- Record last updated
- May 7, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (603) 437-6804
- Medicare enrollment
- Enrolled (PECOS I20141006000176); accepts Medicare assignment
- Medical or professional school
- New England College Of Optometry, 2004
- Entity
- Type 1 · individual
8 nearest optometrist records → All 293 in New Hampshire → Look up another NPI →
Verify John Michael O'Block in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich New Hampshire board licenses this profession
Search for license 0823Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4% fewer Medicare Part D claims than the average optometrist in 2024
265 Medicare Part D claims for 111 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 42% of claims.
Most prescribed
- Latanoprost56 claims
- Neomycin-Polymyxin-Dexameth50 claims
- Xiidra19 claims
- Lumigan18 claims
- Prednisolone Acetate16 claims
- Doxycycline Hyclate14 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: $300.96
11 payments; by number, the most common kind was food and beverage; the largest payer was CooperVision Inc. The 34,453 providers of this specialty with any payment received $769.99 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
- Spindel Eye Associates PCDerry, NH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Michael O'Block among 293 optometrist records in New Hampshire
John Michael O'Block, O.D. is one of 293 optometrist records with a practice address in New Hampshire. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 56% of them.
- NPI issued2008 · 56% of these records are older, 41% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2004 · median 2007 among the 202 with a school on file
- Record last updated2014 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 152W00000X and a New Hampshire practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
8 optometrist records list a practice address in Derry
They are 8 of the 597 NPPES records with a practice address in Derry, and 293 optometrist records in New Hampshire.
All 293 in New Hampshire → Every provider in Derry → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Keith Emery, ODDerry, NH 030381336226547
- Yue FuLondonderry, NH 030381114206547
- Nicole Leo, ODDerry, NH 030381295336030
- Diane Nelson, ODDerry, NH 030381861579070
- Brandon Nguyen, ODDerry, NH 030381063145233
- Jordan Noall, ODDerry, NH 030381487541629
- Tina Porzukowiak, ODDerry, NH 030381952347080
- Sarah Wood, ODDerry, NH 030381598847907
Common questions
What is John Michael O'Block, O.D.'s NPI number?
John Michael O'Block, O.D.'s National Provider Identifier (NPI) is 1427200724, issued on Oct 17, 2008. An NPI identifies a provider in billing; it is not a license.
Where is John Michael O'Block, O.D. located?
The NPPES record lists a practice address at 6 Tsienneto Road Suite 101, Derry, NH, 03038. Phone: (603) 434-4193. Providers update this record themselves, so call before visiting.
How can I verify John Michael O'Block, O.D.'s license?
NPPES lists New Hampshire license number 0823, as entered by the provider. Search the New Hampshire board that licenses this profession; the NPPES record confirms identity only.
How much does John Michael O'Block, O.D. prescribe under Medicare Part D?
In 2024, John Michael O'Block, O.D. had 265 Medicare Part D claims for 111 beneficiaries; the average among optometrist prescribers was 277. 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.