Geoffrey Allan Block, MD
Nephrology Physician · Lone Tree, CO
Geoffrey Allan Block, MD is a nephrology physician with a practice address in Lone Tree, Colorado, and NPI 1861474140, issued on Nov 14, 2005. Check the license (Colorado 36176, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Geoffrey Allan Block
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- 36176 CO
Self-reported in NPPES; status is on the state search - Practice location
- 9777 S Yosemite St Ste 110, Lone Tree, CO 80124
- Phone
- (720) 696-0852
- Enumerated
- Nov 14, 2005
- Record last updated
- Apr 22, 2022
- Fax
- (720) 696-0892
- Medicaid ID
- 01361765 CO
- Medicare enrollment
- Enrolled (PECOS I20101123000038); accepts Medicare assignment
- Medical or professional school
- University Of Cincinnati College Of Medicine, 1991
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 182 in Colorado → Look up another NPI →
Also registered at 9777 S Yosemite St Ste 110
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Andrew Brookens, M.D.Nephrology Physician1396035341
- Steven Fabian, M.D.Nephrology Physician1942315668
- Eileen Fish, MDNephrology Physician1982747374
- Samantha Hall, MASSAGE THERAPISTMassage Therapist1366082430
- Maria Mercier, NPNurse Practitioner1790733624
- Christopher Moore, C-APNFamily Nurse Practitioner1457924557
Verify Geoffrey Allan Block in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 36176Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average nephrology physician in 2024
77 Medicare Part D claims for 11 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D.
Most prescribed
- Gabapentin12 claims
- Losartan Potassium12 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: $28,531.41
9 payments; by number, the most common kind was consulting fee; the largest payer was Outset Medical Inc. The 8,230 providers of this specialty with any payment received $3,091.37 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
- Rocky Mountain Kidney Care LLCLone Tree, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Geoffrey Allan Block among 182 nephrology physician records in Colorado
Geoffrey Allan Block, MD is one of 182 nephrology physician records with a practice address in Colorado. 81% 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, 72% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated1991 · median 2002 among the 133 with a school on file
- Record last updated2022 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Colorado
There are 182 nephrology physician records in Colorado.
All 182 in Colorado → Every provider in Lone Tree → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Andrew Brookens, M.D.Lone Tree, CO 801241396035341
- Steven Fabian, M.D.Lone Tree, CO 801241942315668
- Bruce Fisch, MDLone Tree, CO 801241639151913
- Eileen Fish, MDLone Tree, CO 801241982747374
- Cynthia Kristensen, MDLone Tree, CO 801241134101421
- Jeffrey Ramsey, DOLone Tree, CO 801241700463007
- Michael Rocklin, M.D.Lone Tree, CO 801241063494367
- Hasan Salameh, MDLone Tree, CO 801241578761003
Common questions
What is Geoffrey Allan Block, MD's NPI number?
Geoffrey Allan Block, MD's National Provider Identifier (NPI) is 1861474140, issued on Nov 14, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Geoffrey Allan Block, MD located?
The NPPES record lists a practice address at 9777 S Yosemite St Ste 110, Lone Tree, CO, 80124. Phone: (720) 696-0852. Providers update this record themselves, so call before visiting.
How can I verify Geoffrey Allan Block, MD's license?
NPPES lists Colorado license number 36176, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Geoffrey Allan Block, MD prescribe under Medicare Part D?
In 2024, Geoffrey Allan Block, MD had 77 Medicare Part D claims for 11 beneficiaries; the average among nephrology physician prescribers was 1,465. 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.