Ellyn Tennyson, CRNP
Acute Care Nurse Practitioner · Baltimore, MD
Ellyn Tennyson, CRNP is an acute care nurse practitioner with a practice address in Baltimore, Maryland, and NPI 1376752790, issued on May 22, 2007. Check the license (Maryland R089051, as entered in NPPES) with the Maryland board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Ellyn Tennyson
- Credential
- CRNP
- Primary taxonomy
- Acute Care Nurse Practitioner 363LA2100X
- License number
- R089051 MD
Self-reported in NPPES; status is on the state search - Practice location
- 22 S Greene St, Baltimore, MD 21201
- Phone
- (410) 328-8870
- Enumerated
- May 22, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20130306000354); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest acute care nurse practitioner records → All 755 in Maryland → Look up another NPI →
Also registered at 22 S Greene St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Ellyn Tennyson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license R089051Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average acute care nurse practitioner in 2024
63 Medicare Part D claims for 27 beneficiaries, against an average of 594 among the 13,133 providers of this specialty who prescribed in Part D. 18 claims were for opioids.
Most prescribed
- Oxycodone Hcl14 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
- Shock Trauma Associates PABaltimore, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ellyn Tennyson among 755 acute care nurse practitioner records in Maryland
Ellyn Tennyson, CRNP is one of 755 acute care nurse practitioner records with a practice address in Maryland. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 5% of them.
- NPI issued2007 · 5% of these records are older, 87% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2005 · median 2017 among the 494 with a school on file
- Record last updated2007 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LA2100X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
423 acute care nurse practitioner records list a practice address in Baltimore
They are 423 of the 35,183 NPPES records with a practice address in Baltimore, and 755 acute care nurse practitioner records in Maryland.
All 755 in Maryland → Every provider in Baltimore → Acute Care Nurse Practitioner nationwide →
The 8 acute care nurse practitioner records with the nearest ZIP codes
- Michelle Agostini, NPBaltimore, MD 212011346467610
- Lynn Dees, CRNPBaltimore, MD 212011265412316
- P Frawley, ACNPBaltimore, MD 212011215147814
- Colleen Gaffney, CRNPBaltimore, MD 212011295957579
- T. Nicole Kelley, RN, MS, CRNPBaltimore, MD 212011932241981
- Lou-Ellen Lallier, CRNPBaltimore, MD 212011649480096
- Benjamin Laughton, CRNPBaltimore, MD 212011902016512
- Melinda Lebrun, CRNPBaltimore, MD 212011639395932
Common questions
What is Ellyn Tennyson, CRNP's NPI number?
Ellyn Tennyson, CRNP's National Provider Identifier (NPI) is 1376752790, issued on May 22, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Ellyn Tennyson, CRNP located?
The NPPES record lists a practice address at 22 S Greene St, Baltimore, MD, 21201. Phone: (410) 328-8870. Providers update this record themselves, so call before visiting.
How can I verify Ellyn Tennyson, CRNP's license?
NPPES lists Maryland license number R089051, as entered by the provider. Search the Maryland board that licenses this profession; the NPPES record confirms identity only.
How much does Ellyn Tennyson, CRNP prescribe under Medicare Part D?
In 2024, Ellyn Tennyson, CRNP had 63 Medicare Part D claims for 27 beneficiaries; the average among acute care nurse practitioner prescribers was 594. 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.