Dr. Cassandra Ohlsen, MD
- Medicare services, 2024
- 701
- Medicare patients, 2024
- 451
- Part D claims, 2024
- 3,907
- MIPS score, 2024
- 24
- Hospital affiliations
- 1
- Practice address
- 23625 W R Holman Highway, Monterey, CA 93940
- Practice phone
- Call (831) 624-5311
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Ohlsen's professional email, personal email and mobile number
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Dr. Cassandra Ohlsen is an internist in Monterey, California
Dr. Ohlsen practices at Community Hospital of the Monterey Peninsula in Monterey, California, part of Montage Health.
Dr. Ohlsen's NPI, 1356457170, was assigned on August 22, 2006. Dr. Ohlsen graduated from Keck School of Medicine of USC in 1984. Dr. Ohlsen holds California license G56448.
- NPI
- 1356457170NPI Registry (opens in a new tab)
- NPI enumeration date
- August 22, 2006
- NPI status
- Active
- Practice phone
- (831) 624-5311
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 68
- Medical school graduation
- 1984
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Cassandra Ohlsen practices at Community Hospital of the Monterey Peninsula in Monterey, California
Dr. Ohlsen's primary practice is Community Hospital of the Monterey Peninsula, at 23625 W R Holman Highway, Monterey, CA 93940 in Monterey County. The practice phone is (831) 624-5311.
- Community Hospital of the Monterey Peninsula23625 W R Holman Highway, Monterey, CA 93940 · Monterey CountyPhone(831) 624-5311
Source: Dmand AI Affiliation Data
Dr. Cassandra Ohlsen is affiliated with 2 sites of care
Dr. Ohlsen's primary practice is Community Hospital of the Monterey Peninsula in Monterey, California, part of Montage Health. Dmand AI also links Dr. Ohlsen to 1 physician office, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Cassandra Ohlsen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ohlsen practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Community Hospital of the Monterey Peninsula | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Cassandra Ohlsen is one of 16,751 internists in California
Internal medicine is Dr. Ohlsen's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Ohlsen is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Ohlsen's licenses on file in 2 states: California and Colorado.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Colorado license
Clinical focus
Dmand AI lists acid reflux, acute mini-stroke (TIA), acute skin infection, ankle or foot injury, arthritis, asthma, atrial fibrillation and flutter and bronchitis among the conditions Dr. Ohlsen treats.
Internists near Dr. Ohlsen
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 Ohlsen billed Medicare for 701 services in 2024
CMS data shows 701 Medicare services from Dr. Ohlsen across 6 procedure codes in 2024, for 451 Medicare patients. Medicare paid $61,220 for them. Every service was in an office.
Dr. Ohlsen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 8472024: 49042%
- Other services
- 2023: 5792024: 19666%
- Tests and treatments
- 2023: 932024: 1584%
- Lab and pathology
- 2023: 392024: 0100%
Dr. Ohlsen compared with the California median for internists, 2024
- Dr. Ohlsen
- California median
- Medicare services
- 701vs 36194% above
- Medicare patients
- 451vs 1513.0 times
- Part D claims
- 3,431vs 4218.1 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Ohlsen's most billed Medicare procedure codes, 2024
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. Cassandra Ohlsen treated 451 Medicare patients in 2024, average age 77
CMS counts 451 Medicare patients who saw Dr. Ohlsen in 2024. The largest group is 75 to 84, with 214 patients. 75% of them have high cholesterol, and 73% have high blood pressure. Their average risk score is 0.80, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Ohlsen's median patient age at 73, with 79% women.
Dr. Ohlsen's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Ohlsen's Medicare patients by sex, 2024
- Women38585%
- Men6615%
Chronic conditions among Dr. Ohlsen's Medicare patients, 2024
- High cholesterol75%
- High blood pressure73%
- Arthritis45%
- Osteoporosis33%
- Ischemic heart disease22%
- Anxiety19%
- Cancer19%
- Diabetes16%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ohlsen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women79%
- Men21%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Cassandra Ohlsen wrote 3,907 Medicare Part D claims in 2024
In 2024, Dr. Ohlsen wrote 3,907 Medicare Part D claims for 503 patients. 93% of them were for generic drugs. CMS names the drug for 3,431 of them, across 60 drugs with 11 or more claims each, at $65,391 in total drug cost. In 2023, CMS named 4,332 claims across 74 drugs.
Dr. Ohlsen's Part D claims by kind of drug, 2024
- Generic3,627 claims93%
- Brand-name and other280 claims7%
Dr. Ohlsen's 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.
Drug classes CMS tracks in Dr. Ohlsen's Part D claims, 2024
- Antibiotics1%55 of 3,907 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 4,3322024: 3,43121%
Drugs named by CMS: 60 in 2024, 74 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
Dr. Cassandra Ohlsen scored 24 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 24 out of 100 for Dr. Ohlsen for performance year 2024, reported individually.
Dr. Ohlsen's MIPS scores, performance year 2024
- 24of 100Final score
- 0of 100Quality
- 0of 100Improvement Activities
- 79of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Cassandra Ohlsen graduated from Keck School of Medicine of USC
Dr. Ohlsen graduated from Keck School of Medicine of USC in 1984.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Cassandra Ohlsen accepts plans from 6 insurance carriers
Dr. Ohlsen is in network with 6 carriers, including Highmark, United Healthcare and Blue Cross Blue Shield of Massachusetts. PPO plans come from the most carriers, 5. Check the plan with the practice before a visit.
- Highmark
- United Healthcare
- Blue Cross Blue Shield of Massachusetts
- HCSC
- DentaQuest
- Elevance
Plan types Dr. Ohlsen accepts, by number of carriers
- PPO5
- Medicare4
- HMO3
- POS2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Cassandra Ohlsen'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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Cassandra Ohlsen
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 Ohlsen's NPI number?
Dr. Cassandra Ohlsen's NPI number is 1356457170. It was assigned on August 22, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Cassandra Ohlsen?
Dr. Cassandra Ohlsen is an internist in Monterey, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Cassandra Ohlsen practice?
Dr. Ohlsen practices at 23625 W R Holman Highway, Monterey, CA 93940. Dr. Ohlsen's primary practice is Community Hospital of the Monterey Peninsula in Monterey, California, part of Montage Health. Dmand AI also links Dr. Ohlsen to 1 physician office.
What is Dr. Cassandra Ohlsen's office phone number?
The practice phone on file for Dr. Ohlsen is (831) 624-5311.
What is Dr. Cassandra Ohlsen's medical license number?
Dr. Ohlsen holds California license G56448, one of the licenses on file in 2 states.
Which states has Dr. Cassandra Ohlsen been licensed in?
Dmand AI has state licenses on file for Dr. Ohlsen in California (1985 to 2027) and Colorado (1992 to 1999).
Which hospitals is Dr. Cassandra Ohlsen affiliated with?
Dr. Ohlsen practices at Community Hospital of the Monterey Peninsula in Monterey, California.
Does Dr. Cassandra Ohlsen accept Medicare?
Yes. CMS data shows Dr. Ohlsen billed Medicare for 701 services in 2024.
What is Dr. Cassandra Ohlsen's MIPS score?
Dr. Ohlsen's MIPS final score for performance year 2024 is 24 out of 100, reported individually.
How many Medicare patients does Dr. Cassandra Ohlsen see?
CMS counts 451 Medicare patients who saw Dr. Ohlsen in 2024, with an average age of 77.
Show 6 more questionsShow fewer questions
Is Dr. Cassandra Ohlsen board certified?
Yes. Dr. Ohlsen is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Cassandra Ohlsen bill to Medicare?
In 2024, Dr. Ohlsen's most billed Medicare services were office visit, established patient (99213), medicare service (G0439) and office visit, established patient (99214).
Where did Dr. Cassandra Ohlsen go to medical school?
Dr. Ohlsen graduated from Keck School of Medicine of USC in 1984.
What drugs does Dr. Cassandra Ohlsen prescribe most?
In 2024 Medicare Part D data, Dr. Ohlsen's most prescribed drugs by claims were Levothyroxine Sodium, Losartan Potassium and Atorvastatin Calcium.
How long has Dr. Cassandra Ohlsen been practicing?
Dr. Ohlsen graduated from medical school in 1984, 42 years ago.
What insurance does Dr. Cassandra Ohlsen accept?
Dr. Ohlsen is in network with 6 carriers, including Highmark, United Healthcare and Blue Cross Blue Shield of Massachusetts. PPO plans come from the most carriers, 5. Check the plan with the practice before a visit.
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