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Dr. Kellen A. Knowles, MD
NPI1104282003PAC ID5395094551
- Medicare services, 2022
- 190
- Part D claims, 2024
- 268
- Publications
- 7
- Hospital affiliations
- 2
- Industry payments
- $462
- Practice address
- 10755 Falls Road, Suite 110b, Lutherville, MD 21093
- Practice phone
- Call (410) 583-2811
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Johns Hopkins Surgery Centers - Lutherville
Surgery Center - Medicare-Certified · Lutherville, Maryland
Find Dr. Knowles' professional email, personal email and mobile number
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Dr. Kellen A. Knowles is an internist in Lutherville Timonium, Maryland
Dr. Knowles practices at Johns Hopkins Surgery Centers - Lutherville in Lutherville, Maryland.
Dr. Knowles' NPI, 1104282003, was assigned on January 7, 2016. Dr. Knowles graduated from Johns Hopkins University School of Medicine in 2018. Dr. Knowles holds Maryland license D91444.
NPI and contact details
- NPI
- 1104282003NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5395094551
- NPI enumeration date
- January 7, 2016
- NPI status
- Active
- Practice phone
- (410) 583-2811
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 34
- Medical school graduation
- 2018
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Kellen A. Knowles practices at Johns Hopkins Surgery Centers - Lutherville in Lutherville, Maryland
Dr. Knowles' primary practice is Johns Hopkins Surgery Centers - Lutherville, at 10755 Falls Road, Suite 110b, Lutherville, MD 21093. The practice phone is (410) 583-2811.
- Johns Hopkins Surgery Centers - Lutherville10755 Falls Road, Suite 110b, Lutherville, MD 21093Phone(410) 583-2811
Source: Dmand AI Affiliation Data
Dr. Kellen A. Knowles is affiliated with 5 sites of care and 2 medical groups
Dr. Knowles' primary practice is Johns Hopkins Surgery Centers - Lutherville in Lutherville, Maryland. Dr. Knowles is also affiliated with The Johns Hopkins Hospital. The medical group on file is Johns Hopkins University. Dmand AI also links Dr. Knowles to 1 more hospital, 1 group practice or clinic, 1 ambulatory surgery center and 1 medical group, each named with a free account.
Johns Hopkins Surgery Centers - LuthervillePrimary
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Kellen A. Knowles' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Knowles practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Johns Hopkins Surgery Centers - Lutherville | Available with a free account |
| +4 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Kellen A. Knowles is one of 3,320 internists in Maryland
Internal medicine is Dr. Knowles' primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Knowles is licensed in Maryland.
Specialties and state licenses
- Internal medicine, MarylandPrimary
Internists near Dr. Knowles
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Kellen A. Knowles billed Medicare for 190 services in 2022
CMS data shows 190 Medicare services from Dr. Knowles across 5 procedure codes in 2022. Medicare paid $14,945 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2022190
Paid by Medicare$14,945
Procedure codes5
Dr. Knowles' Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 1632022: 19017%
Dr. Knowles compared with the Maryland median for internists, 2022
- Dr. Knowles
- Maryland median
- Medicare services
- 190vs 65671% below
- Part D claims
- 180vs 30942% below
Medians across 3,215 internists in Maryland with Dmand AI profiles that report each measure.
Dr. Knowles' most billed Medicare procedure codes, 2022
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Kellen A. Knowles' patients have a median age of 68
Across all payers, Dmand AI patient panel data puts Dr. Knowles' median patient age at 68, with 25% women.
Dr. Knowles' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women25%
- Men75%
Source: Dmand AI Patient Panel Data
Dr. Kellen A. Knowles wrote 268 Medicare Part D claims in 2024
In 2024, Dr. Knowles wrote 268 Medicare Part D claims for 34 patients. 89% of them were for generic drugs. CMS names the drug for 180 of them, across 8 drugs with 11 or more claims each, at $18,977 in total drug cost. In 2023, CMS named 73 claims across 3 drugs.
Part D claims, 2024268
Drugs named by CMS8
Total drug cost$18,977
Part D patients34
Dr. Knowles' Part D claims by kind of drug, 2024
- Generic238 claims89%
- Brand-name30 claims11%
Dr. Knowles' most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 732024: 180147%
Drugs named by CMS: 8 in 2024, 3 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Kellen A. Knowles has 7 publications on record
Dmand AI links 7 papers to Dr. Knowles, published from 2017 to 2023. 2021 was the busiest year, with 2. Dr. Knowles has published most often in JMIR Mhealth Uhealth. Dr. Knowles' most frequent co-authors are Francoise Adeline Marvel, MD, William Edward Yang, MD and Seth Shay Martin.
Papers7
Years published2017 to 2023
Dr. Knowles' papers by year, 2017 to 2023
Dr. Knowles' most frequent co-authors
- Francoise Adeline Marvel, MD4 shared papers
- William Edward Yang, MD3 shared papers
- Seth Shay Martin2 shared papers
Recent publications by Dr. Knowles
CaregiversHeart DiseasesRandomized Controlled Trials as Topic
See who Dr. Knowles researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Knowles works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Kellen A. Knowles received $462 in industry payments from 2022 to 2025
CMS Open Payments shows 14 general payments to Dr. Knowles from 5 drug and device companies from 2022 to 2025. Food and beverage make up the largest share, 100% of the total. ShockWave Medical, Inc paid the most, $161.
General payments to Dr. Knowles by program year, 2022 to 2025
Companies that paid Dr. Knowles the most, 2022 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Kellen A. Knowles graduated from Johns Hopkins University School of Medicine
Dr. Knowles graduated from Johns Hopkins University School of Medicine in 2018.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Kellen A. Knowles's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Kellen A. Knowles
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Kellen A. Knowles' NPI number?
Dr. Kellen A. Knowles' NPI number is 1104282003. It was assigned on January 7, 2016, and it is active in the NPI Registry.
What kind of doctor is Dr. Kellen A. Knowles?
Dr. Kellen A. Knowles is an internist in Lutherville Timonium, Maryland. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Kellen A. Knowles practice?
Dr. Knowles practices at 10755 Falls Road, Suite 110b, Lutherville, MD 21093. Dr. Knowles' primary practice is Johns Hopkins Surgery Centers - Lutherville in Lutherville, Maryland. Dmand AI also links Dr. Knowles to 1 hospital, 1 group practice or clinic, 1 ambulatory surgery center and 1 medical group.
What is Dr. Kellen A. Knowles' office phone number?
The practice phone on file for Dr. Knowles is (410) 583-2811.
What is Dr. Kellen A. Knowles' medical license number?
Dr. Knowles holds Maryland license D91444.
Which hospitals is Dr. Kellen A. Knowles affiliated with?
Dr. Knowles is affiliated with The Johns Hopkins Hospital. Dmand AI links Dr. Knowles to 1 more hospital.
What medical group is Dr. Kellen A. Knowles part of?
Dr. Knowles is linked to Johns Hopkins University. Dmand AI links Dr. Knowles to 1 more medical group.
Does Dr. Kellen A. Knowles accept Medicare?
Yes. CMS data shows Dr. Knowles billed Medicare for 190 services in 2022.
What services does Dr. Kellen A. Knowles bill to Medicare?
In 2022, Dr. Knowles' most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99233) and office visit, established patient (99214).
Where did Dr. Kellen A. Knowles go to medical school?
Dr. Knowles graduated from Johns Hopkins University School of Medicine in 2018.
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What drugs does Dr. Kellen A. Knowles prescribe most?
In 2024 Medicare Part D data, Dr. Knowles' most prescribed drugs by claims were Atorvastatin Calcium, Losartan Potassium and Metoprolol Succinate.
Has Dr. Kellen A. Knowles received payments from drug or device companies?
CMS Open Payments shows $462 in general payments to Dr. Knowles from 5 companies from 2022 to 2025. The largest total came from ShockWave Medical, Inc.
How long has Dr. Kellen A. Knowles been practicing?
Dr. Knowles graduated from medical school in 2018, 8 years ago.
Does Dr. Kellen A. Knowles do research?
Dmand AI links 7 publications to Dr. Knowles, published from 2017 to 2023.
Who does Dr. Kellen A. Knowles publish with?
Dr. Knowles' most frequent co-authors are Francoise Adeline Marvel, MD (4 shared papers), William Edward Yang, MD (3 shared papers) and Seth Shay Martin (2 shared papers).
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