Dr. Assar Ahmed Rather, MD
- Medicare services, 2024
- 431
- Medicare patients, 2024
- 313
- Part D claims, 2024
- 25
- Hospital affiliations
- 2
- Industry payments
- $9,404
- Practice address
- 640 S State Street, Dover, DE 19901
- Practice phone
- Call (302) 744-7001
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Rather's professional email, personal email and mobile number
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Dr. Assar Ahmed Rather is a colorectal surgeon in Dover, Delaware
Dr. Rather practices at Bayhealth Hospital, Kent Campus in Dover, Delaware, part of Bayhealth Medical Center.
Dr. Rather's NPI, 1174834097, was assigned on June 25, 2010. Dr. Rather holds Delaware license C1-0009722.
- NPI
- 1174834097NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4587835251
- NPI enumeration date
- June 25, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (302) 744-7001
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 52
- Medical school graduation
- 2000
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Assar Ahmed Rather practices at Bayhealth Hospital, Kent Campus in Dover, Delaware
Dr. Rather's primary practice is Bayhealth Hospital, Kent Campus, at 640 S State Street, Dover, DE 19901 in Kent County. The practice phone is (302) 744-7001.
- Bayhealth Hospital, Kent Campus640 S State Street, Dover, DE 19901 · Kent CountyPhone(302) 744-7001
Source: Dmand AI Affiliation Data
Dr. Assar Ahmed Rather is affiliated with 4 sites of care and 1 medical group
Dr. Rather's primary practice is Bayhealth Hospital, Kent Campus in Dover, Delaware, part of Bayhealth Medical Center. Dr. Rather is also affiliated with Bayhealth Hospital, Sussex Campus. The medical group on file is Bayhealth. Dmand AI also links Dr. Rather to 1 more group practice or clinic and 1 home health agency, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Assar Ahmed Rather's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Rather practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Bayhealth Hospital, Kent Campus | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Assar Ahmed Rather is one of 7 colorectal surgeons in Delaware
Colon and rectal surgery is Dr. Rather's primary specialty in the NPI Registry, under taxonomy code 208C00000X. Dr. Rather is licensed in Delaware.
Specialties and state licenses
- Colon and rectal surgery, DelawarePrimary
Colorectal surgeons near Dr. Rather
Counts of colorectal surgeons 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. Assar Ahmed Rather billed Medicare for 431 services in 2024
CMS data shows 431 Medicare services from Dr. Rather across 13 procedure codes in 2024, for 313 Medicare patients. Medicare paid $40,077 for them.
Dr. Rather's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3422024: 30710%
- Surgery
- 2023: 932024: 11220%
- Other services
- 2023: 132024: 128%
Where Dr. Rather's Medicare services took place, 2024
- In an office24657%
- In a facility18543%
Dr. Rather'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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Source: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data
Dr. Assar Ahmed Rather treated 313 Medicare patients in 2024, average age 74
CMS counts 313 Medicare patients who saw Dr. Rather in 2024. The largest group is 65 to 74, with 141 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 13% are also on Medicaid. Their average risk score is 1.49, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Rather's median patient age at 68, with 57% women.
Dr. Rather's Medicare patients by age, 2024
Dr. Rather's Medicare patients by sex, 2024
- Women17757%
- Men13643%
Chronic conditions among Dr. Rather's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis49%
- Chronic kidney disease38%
- Cancer37%
- Ischemic heart disease37%
- Diabetes36%
- Anxiety27%
Share of Medicare patients with each condition. A patient can have several.
Dr. Rather's 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
- Women57%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Assar Ahmed Rather wrote 25 Medicare Part D claims in 2024
In 2024, Dr. Rather wrote 25 Medicare Part D claims for 17 patients. 84% of them were for generic drugs. They cover 2 drugs, with $472 in total drug cost. In 2020, CMS named 20 claims across 1 drug.
Dr. Rather's Part D claims by kind of drug, 2024
- Generic21 claims84%
- Brand-name and other4 claims16%
Dr. Rather's most prescribed drugs by claims, 2021
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, 2020 to 2021
- 2020
- 2021
- Claims for drugs CMS names
- 2020: 202021: 2735%
Drugs named by CMS: 2 in 2021, 1 in 2020.
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. Assar Ahmed Rather ranks in the 79th percentile for colonoscopy in Medicare
Dr. Rather accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 95 procedures of colonoscopy by Dr. Rather, more than 79% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Rather ranks in Medicare procedure volume
- Colonoscopy
- 79th percentile95 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 46th percentile15 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Hernia repair (minimally invasive): 1 to 10 procedures (CMS shows small counts as a range)
Hernia repair - groin (open): 1 to 10 procedures (CMS shows small counts as a range)
Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Assar Ahmed Rather received $9,404 in industry payments from 2016 to 2025
CMS Open Payments shows 90 general payments to Dr. Rather from 12 drug and device companies from 2016 to 2025. Education make up the largest share, 53% of the total. Intuitive Surgical, Inc. paid the most, $6,782.
General payments to Dr. Rather by program year, 2016 to 2025
General payments to Dr. Rather by kind, 2016 to 2025
- Education$5,00053%
- Food and beverage$2,50027%
- Travel and lodging$1,90420%
Companies that paid Dr. Rather the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Assar Ahmed Rather'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) |
| 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 | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (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. Assar Ahmed Rather
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. Assar Ahmed Rather's NPI number?
Dr. Assar Ahmed Rather's NPI number is 1174834097. It was assigned on June 25, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. Assar Ahmed Rather?
Dr. Assar Ahmed Rather is a colorectal surgeon in Dover, Delaware. The primary specialty in the NPI Registry is Colon & Rectal Surgery Physician (taxonomy code 208C00000X).
Where does Dr. Assar Ahmed Rather practice?
Dr. Rather practices at 640 S State Street, Dover, DE 19901. Dr. Rather's primary practice is Bayhealth Hospital, Kent Campus in Dover, Delaware, part of Bayhealth Medical Center. Dmand AI also links Dr. Rather to 1 group practice or clinic and 1 home health agency.
What is Dr. Assar Ahmed Rather's office phone number?
The practice phone on file for Dr. Rather is (302) 744-7001.
What is Dr. Assar Ahmed Rather's medical license number?
Dr. Rather holds Delaware license C1-0009722.
Which hospitals is Dr. Assar Ahmed Rather affiliated with?
Dr. Rather practices at Bayhealth Hospital, Kent Campus in Dover, Delaware. Dr. Rather is also affiliated with Bayhealth Hospital, Sussex Campus.
What medical group is Dr. Assar Ahmed Rather part of?
Dr. Rather is linked to Bayhealth.
Does Dr. Assar Ahmed Rather accept Medicare?
Yes. CMS data shows Dr. Rather billed Medicare for 431 services in 2024, and Dr. Rather accepts Medicare assignment.
How many Medicare patients does Dr. Assar Ahmed Rather see?
CMS counts 313 Medicare patients who saw Dr. Rather in 2024, with an average age of 74.
What services does Dr. Assar Ahmed Rather bill to Medicare?
In 2024, Dr. Rather's most billed Medicare services were office visit, established patient (99213), office visit, new patient (99203) and office visit, established patient (99212).
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What drugs does Dr. Assar Ahmed Rather prescribe most?
In 2021 Medicare Part D data, Dr. Rather's most prescribed drugs by claims were Oxycodone-Acetaminophen and Sodium Chloride.
Has Dr. Assar Ahmed Rather received payments from drug or device companies?
CMS Open Payments shows $9,404 in general payments to Dr. Rather from 12 companies from 2016 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Assar Ahmed Rather been practicing?
Dr. Rather graduated from medical school in 2000, 26 years ago.
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