Christopher Sheridan Ryckman, M.D.
Critical Care Medicine (Internal Medicine) Physician · Lancaster, OH
Christopher Sheridan Ryckman, M.D. is a critical care medicine (internal medicine) physician with a practice address in Lancaster, Ohio, and NPI 1912984105, issued on Dec 28, 2005. Check the license (Ohio 048474, as entered in NPPES) on the State Medical Board of Ohio; the Medicare figures below come from public CMS files.
- Name
- Christopher Sheridan Ryckman
- Credential
- M.D.
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- License number
- 048474 OH
Self-reported in NPPES; status is on the state search - Practice location
- 110 N Ewing St, Lancaster, OH 43130
- Phone
- (740) 687-5864
- Enumerated
- Dec 28, 2005
- Record last updated
- Jul 13, 2026
- Medicaid ID
- 0628306 OH
- Entity
- Type 1 · individual
8 nearest critical care medicine (internal medicine) physician records → All 204 in Ohio → Look up another NPI →
Verify Christopher Sheridan Ryckman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersState Medical Board of Ohio
Search for license 048474Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average critical care medicine (internal medicine) physician in 2024
18 Medicare Part D claims, against an average of 696 among the 2,873 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.
Christopher Sheridan Ryckman among 204 critical care medicine (internal medicine) physician records in Ohio
Christopher Sheridan Ryckman, M.D. is one of 204 critical care medicine (internal medicine) physician records with a practice address in Ohio. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 84% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileNo · 80% of these records are
- Record last updated2026 · 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 207RC0200X and a Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Critical Care Medicine (Internal Medicine) Physician providers in Ohio
There are 204 critical care medicine (internal medicine) physician records in Ohio.
All 204 in Ohio → Every provider in Lancaster → Critical Care Medicine (Internal Medicine) Physician nationwide →
The 8 critical care medicine (internal medicine) physician records with the nearest ZIP codes
- Geoffrey Polen, MDWesterville, OH 430811942268107
- Eder Caceres Reatiga, MDColumbus, OH 432101659883726
- Shaban Mahmoud, MDMount Vernon, OH 430501194719286
- Nicholas Pastis, MDColumbus, OH 432101942203922
- Philip Fields, MDColumbus, OH 432131932155330
- David Hunt, MDColumbus, OH 432131023057759
- Daniel Adams, M.D.Columbus, OH 432141093941726
- Simrit Bhullar, D.O.Columbus, OH 432141417079450
Common questions
What is Christopher Sheridan Ryckman, M.D.'s NPI number?
Christopher Sheridan Ryckman, M.D.'s National Provider Identifier (NPI) is 1912984105, issued on Dec 28, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Christopher Sheridan Ryckman, M.D. located?
The NPPES record lists a practice address at 110 N Ewing St, Lancaster, OH, 43130. Phone: (740) 687-5864. Providers update this record themselves, so call before visiting.
How can I verify Christopher Sheridan Ryckman, M.D.'s license?
NPPES lists Ohio license number 048474, as entered by the provider. Search the State Medical Board of Ohio at https://elicense.ohio.gov/oh_verifylicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Christopher Sheridan Ryckman, M.D. prescribe under Medicare Part D?
In 2024, Christopher Sheridan Ryckman, M.D. had 18 Medicare Part D claims; the average among critical care medicine (internal medicine) physician prescribers was 696. 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.