Clin Pharmacol Drug Dev
Administration, InhalationArea Under CurveCytochrome P-450 CYP3A Inhibitors
Dr. Cassandra C. Key, MD
NPI1568645638
- Medicare services, 2016
- 241
- Part D claims, 2019
- 104
- Publications
- 2
- Clinical trials
- 8
- Industry payments
- $46
- Practice address
- 10127 Huebner Rd, San Antonio, TX 78240
- Practice phone
- Call (210) 344-2673
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Key's professional email, personal email and mobile number
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Dr. Cassandra C. Key is an internist in San Antonio, Texas
Dr. Key practices in San Antonio, Texas.
Dr. Key's NPI, 1568645638, was assigned on December 12, 2007. Dr. Key holds Texas license N5154.
NPI and contact details
- NPI
- 1568645638NPI Registry (opens in a new tab)
- NPI enumeration date
- December 12, 2007
- NPI status
- Active
- Practice phone
- (210) 344-2673
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Cassandra C. Key's practice address is in San Antonio, Texas
Dr. Key's practice address in the NPI Registry is 10127 Huebner Rd, San Antonio, TX 78240, in Bexar County. The practice phone is (210) 344-2673.
- NPI Registry address10127 Huebner Rd, San Antonio, TX 78240 · Bexar CountyPhone(210) 344-2673
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Cassandra C. Key's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Key practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Key's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Cassandra C. Key is one of 8,437 internists in Texas
Internal medicine is Dr. Key's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Key is licensed in Texas.
Specialties and state licenses
- Internal medicine, TexasPrimary
Internists near Dr. Key
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. Cassandra C. Key billed Medicare for 241 services in 2016
CMS data shows 241 Medicare services from Dr. Key across 3 procedure codes in 2016. Medicare paid $16,938 for them.
Medicare services, 2016241
Paid by Medicare$16,938
Procedure codes3
Where Dr. Key's Medicare services took place, 2016
- In an office6226%
- In a facility17974%
Dr. Key compared with the Texas median for internists, 2016
- Dr. Key
- Texas median
- Medicare services
- 241vs 53955% below
- Part D claims
- 104vs 28964% below
Medians across 7,794 internists in Texas with Dmand AI profiles that report each measure.
Dr. Key's most billed Medicare procedure codes, 2016
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Key?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Key and other internists in Texas.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Cassandra C. Key's patients have a median age of 81
Across all payers, Dmand AI patient panel data puts Dr. Key's median patient age at 81, with 63% women.
Dr. Key's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 81
Patient panel by sex, all payers
- Women63%
- Men38%
Source: Dmand AI Patient Panel Data
Dr. Cassandra C. Key wrote 104 Medicare Part D claims in 2019
In 2019, Dr. Key wrote 104 Medicare Part D claims. They cover 7 drugs, with $5,903 in total drug cost. In 2018, CMS named 132 claims across 8 drugs.
Part D claims, 2019104
Drugs named by CMS7
Total drug cost$5,903
Dr. Key's most prescribed drugs by claims, 2019
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, 2018 to 2019
- 2018
- 2019
- Claims for drugs CMS names
- 2018: 1322019: 10421%
Drugs named by CMS: 7 in 2019, 8 in 2018.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Cassandra C. Key has 2 publications on record
Dmand AI links 2 papers to Dr. Key, published from 2022 to 2024. The most frequent topics are Area Under Curve and Healthy Volunteers. Dr. Key's most frequent co-authors are Emanuel Philip Denoia, MD, Dennis Anthony Ruff, MD and Taylor Gordon Sandison, MD.
Papers2
Years published2022 to 2024
Topics Dr. Key writes about most
- Area Under Curve
- Healthy Volunteers
Dr. Key's most frequent co-authors
- Emanuel Philip Denoia, MD1 shared paper
- Dennis Anthony Ruff, MD1 shared paper
- Taylor Gordon Sandison, MD1 shared paper
Recent publications by Dr. Key
Area Under CurveDouble-Blind MethodEchinocandins
See who Dr. Key researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Key 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. Cassandra C. Key has worked on 8 clinical trials
Dmand AI links Dr. Key to 8 clinical trials, 4 of them phase 1 studies. 1 is still active or recruiting. Conditions studied include Obesity, Polycystic Kidney, Autosomal Dominant and Overnutrition. Eli Lilly and Company sponsors the most, 3. Open Payments lists research payments to Dr. Key that name 3 trials.
Conditions in Dr. Key's trials
- Obesity
- Polycystic Kidney, Autosomal Dominant
- Overnutrition
- Polycystic Kidney Diseases
- Cystic Fibrosis
Investigators on the most trials with Dr. Key
- Keith A. Bellovich, DO1 shared trial
- Neera Kanhouwa Dahl, MD1 shared trial
- Daniel S. Dickerson, MD, PhD1 shared trial
Recent clinical trials with Dr. Key
Polycystic Kidney, Autosomal DominantPolycystic Kidney DiseasesRGLS8429
A Study of RGLS4326 in Patients With Autosomal Dominant Polycystic Kidney Disease (opens in a new tab)
CompletedPhase 1
Polycystic Kidney, Autosomal DominantPolycystic Kidney DiseasesRGLS4326
Cystic FibrosisInfant, Newborn, DiseasesPTI-801PTI-808
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Cassandra C. Key received $46 in industry payments from 2016 to 2024
CMS Open Payments shows 2 general payments to Dr. Key from 2 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 100% of the total. Organon LLC paid the most, $25. It also lists 5 research payments totaling $10,007 from 2022 to 2023, naming 3 clinical trials.
General payments to Dr. Key by program year, 2016 to 2024
Companies that paid Dr. Key the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Cassandra C. Key'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Cassandra C. Key
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. Cassandra C. Key's NPI number?
Dr. Cassandra C. Key's NPI number is 1568645638. It was assigned on December 12, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Cassandra C. Key?
Dr. Cassandra C. Key is an internist in San Antonio, Texas. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Cassandra C. Key practice?
Dr. Key practices at 10127 Huebner Rd, San Antonio, TX 78240.
What is Dr. Cassandra C. Key's office phone number?
The practice phone on file for Dr. Key is (210) 344-2673.
What is Dr. Cassandra C. Key's medical license number?
Dr. Key holds Texas license N5154.
Does Dr. Cassandra C. Key accept Medicare?
Yes. CMS data shows Dr. Key billed Medicare for 241 services in 2016.
What services does Dr. Cassandra C. Key bill to Medicare?
In 2016, Dr. Key's most billed Medicare services were nursing facility care (99309), nursing facility care (99305) and nursing facility care (99308).
What drugs does Dr. Cassandra C. Key prescribe most?
In 2019 Medicare Part D data, Dr. Key's most prescribed drugs by claims were Brimonidine Tartrate, Latanoprost and Atorvastatin Calcium.
Has Dr. Cassandra C. Key received payments from drug or device companies?
CMS Open Payments shows $46 in general payments to Dr. Key from 2 companies from 2016 to 2024. The largest total came from Organon LLC.
How long has Dr. Cassandra C. Key been practicing?
Dr. Key's NPI was assigned in 2007.
Does Dr. Cassandra C. Key do research?
Dmand AI links 2 publications to Dr. Key, published from 2022 to 2024. Dr. Key has worked on 8 clinical trials.
Who does Dr. Cassandra C. Key publish with?
Dr. Key's most frequent co-authors are Emanuel Philip Denoia, MD (1 shared paper), Dennis Anthony Ruff, MD (1 shared paper) and Taylor Gordon Sandison, MD (1 shared paper).
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