George B. Gancayco, M.D.
Internal Medicine Physician · Crystal Lake, IL
George B. Gancayco, M.D. is an internal medicine physician with a practice address in Crystal Lake, Illinois, and NPI 1477566834, issued on Aug 15, 2006. Check the license (Illinois 036096042, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- George B. Gancayco
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036096042 IL
Self-reported in NPPES; status is on the state search - Practice location
- 781 Mchenry Ave, Crystal Lake, IL 60014
- Phone
- (815) 459-2200
- Enumerated
- Aug 15, 2006
- Record last updated
- Dec 21, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (815) 444-9566
- Medicare enrollment
- Enrolled (PECOS I20070628000363); accepts Medicare assignment
- Medical or professional school
- Chicago College Of Medicine And Surgery, 1995
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 781 Mchenry Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Racquel Ramirez-Dolleton, M.D.Family Medicine Physician1265542260
Verify George B. Gancayco in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036096042Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
42% more Medicare Part D claims than the average internal medicine physician in 2024
4,521 Medicare Part D claims for 383 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 191 claims were for opioids.
Most prescribed
- Atorvastatin Calcium327 claims
- Levothyroxine Sodium199 claims
- Amlodipine Besylate159 claims
- Lisinopril145 claims
- Metformin Hcl139 claims
- Metoprolol Succinate136 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.
Bills Medicare through one group practice
- Caring Family S. C.Crystal Lake, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
George B. Gancayco among 7,238 internal medicine physician records in Illinois
George B. Gancayco, M.D. is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 61% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated1995 · median 2003 among the 3,580 with a school on file
- Record last updated2021 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
18 internal medicine physician records list a practice address in Crystal Lake
They are 18 of the 1,442 NPPES records with a practice address in Crystal Lake, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Crystal Lake → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Mukesh Arora, MDCrystal Lake, IL 600141518975796
- Syed Asghar, M.D.Crystal Lake, IL 600141629182712
- Gilbert Egekeze, MDCrystal Lake, IL 600141548361959
- Sanjeev Gupta, MDCrystal Lake, IL 600141659471175
- Carol Kotzan, M.D.Crystal Lake, IL 600141710950100
- Zbigniew Lorenc, MDCrystal Lake, IL 600141902879380
- Sonia Mehta, M.D.Crystal Lake, IL 600141265459895
- Raman Popli, MDCrystal Lake, IL 600141013928712
Common questions
What is George B. Gancayco, M.D.'s NPI number?
George B. Gancayco, M.D.'s National Provider Identifier (NPI) is 1477566834, issued on Aug 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is George B. Gancayco, M.D. located?
The NPPES record lists a practice address at 781 Mchenry Ave, Crystal Lake, IL, 60014. Phone: (815) 459-2200. Providers update this record themselves, so call before visiting.
How can I verify George B. Gancayco, M.D.'s license?
NPPES lists Illinois license number 036096042, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does George B. Gancayco, M.D. prescribe under Medicare Part D?
In 2024, George B. Gancayco, M.D. had 4,521 Medicare Part D claims for 383 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.